Question

Is my answer correct?

Answer 1

Simplify.

(x^2 + 5x + 8)(x^2 + 2x + 6)

A.
x^4 + 10x^2 + 48

B.
x^4 + 2x^3 + 6x^2 + 7x + 14

C.
2x^2 + 7x + 14

D.
x^4 + 7x^3 + 24x^2 + 46x + 48 <------------ My answer

Answer 2

You nailed it. Very nice job.

Answer 3

Thanks! I have a couple of others, would you mind checking those too?

Answer 4

sure thing

Answer 5

correct again, very nice

Answer 6

Use FOIL to multiply the two binomials. (at first I thought it said bananas :P)

(b + 3)(b – 9)

A.
b^2 – 27

B.
b^2 + 12b – 27

C.
b^2 + 6b – 27

D.
b^2 – 6b – 27 <------ My answer

Answer 7

forgot the exponents there :P

Answer 8

but yes, the correct answer is choice D

Answer 9

Expand the squared binomial. ( my minds unique what can I say!)

(x – 4)^2

A.
x^2 – 16

B.
x^2 + 16

C.
x^2 + 8x – 16

D.
x^2 – 8x + 16 <-------- My answer

Answer 10

got it again, congrats

Answer 11

that's good, nothing wrong with a unique mind

Answer 12

Multiply and simplify: –3x^2y^2 • x^3

A.
–3x^5y^6

B.
–3x^6y^2

C.
9x^5y^2

D.
–3x^5y^2 <-------------- My answer (don't know why there are so many D's)

Answer 13

cause they get lazy too apparently, but yes, yet another D

Answer 14

Arrange 3x^2 – 6x^4 + 2 + 4x in order by decreasing powers of x.

A.
–6x^4 + 4x + 3x^2 + 2

B.
–6x^4 + 3x^2 + 4x + 2 <----------- My answer

C.
2 + 4x + 3x^2 – 6x^4

D.
3x^2 – 6x^4 + 2 + 4x

Answer 15

you got it, choice B (finally not another D)

Answer 16

maybe they did it because the common misconception is that C is usually the answer, idk...

Answer 17

The expression (2x + 3)(3x + 4) simplifies to which of the following? (yea maybe so :P I ended up doing the problem before realizing I just had to figure out what it'd end up looking like :P This is question number 7 and htere are 12 in all in case you were wondering thanks again btw)

A.
2x(3x + 4) + 3(3x + 4) <------------ My answer

B.
2x(2x + 3) + 3(3x + 4)

C.
2x(3x + 4)

D.
2x(3x + 4) + (3x + 4)

Answer 18

you are correct, choice A is the answer here

Answer 19

it's fine as long as its your answers and not mine

Answer 20

Not sure if that's right, they always mess me up with those since they do it two different ways and don't tell you -_-

Answer 21

That's not the correct answer

Answer 22

One sec while I type up a solution to show you how to get the answer

Answer 23

Yea I figured, I'll come back to it so it doesn't hold us up....



Subtract and simplify: (3x2 + 7) – (x2 – 6x + 4)

A.
2x^2 + 6x + 3 <----------- My answer

B.
4x^2 – 6x + 3

C.
2x^2 + 6x + 11

D.
4x^2 + 3

Answer 24

you got it, the answer is choice A) 2x^2 + 6x + 3

Answer 25

alright, we'll come back to that prev one

Answer 26

Add and simplify.

(2x2 – 11x) + (3x2 + 11x – 4)

A.
5x^4 – 4 <---------- My answer

B.
6x^2 – 11x – 4

C.
5x^2 – x – 4

D.
5x^2 – 4

Answer 27

hold on

Answer 28

you're going way too fast, one problem at a time please

Answer 29

sorry

Answer 30

There's no rush! I juts don't want to hold you up or anything, take your time :)

Answer 31

its ok, it's just hard to reference the problems if they're not done one at a time

Answer 32

The problem

(2x2 – 11x) + (3x2 + 11x – 4)

the answer is NOT choice A

Answer 33

keep in mind that x^2 + x^2 = 2x^2 and NOT 2x^4

Answer 34

Ohh right! I forgot about that, I'm still thinking I'm multiplying even though I know I'm adding :/ sorry about that, thanks for pointing it out

Answer 35

yw, so the answer for that one is choice ???

Answer 36

D!

Answer 37

lol D strikes again...

Answer 38

yes, D is the answer

Answer 39

yup :D

Answer 40

as for the triangle one, the answer is indeed choice B

Answer 41

Awesome :D I'm gonna ace the test for sure :D This is the last question then we just have the question about volume ugh -_-

Multiply and simplify: 10x(9x2 + 6x + 7)

A.
90x^2 + 60x + 70

B.
9x^2 + 16x + 7

C.
90x^3 + 60x^2 + 70x <-------- My answer

D.
90x^3 + 130x

Answer 42

good, choice C is definitely your answer here

Answer 43

Great! Mmk so do you need me to send you the volume question again?

Answer 44

yes

Answer 45

I'm going to show you how I did it so you can let me know what I did wrong

Answer 46

alright sounds great

Answer 47

So I had (x + 3)(5x - 4)(2x -1)
Then:
x(5x - 4) and 3(5x - 4)

Answer 48

so far so good

Answer 49

Then for the first one, I got
5x^2 - 4x and then for the second equation(correct name?) I got 15x - 12

Answer 50

expression, but you have the right idea

Answer 51

Next, I dropped the 5x^2 unchanged into the final equation at the front (so that everything's in standard form) then I added 15x plus negative 4x (-4x) to get 11x

Answer 52

expression*

Answer 53

and I also dropped down negative 12 (-12) to the final expression unchanged since there was nothing to change it with (if that makes sense) and so my final expression was:
5x^2 + 11x - 12

Answer 54

oh wait!
I'm so sorry, I did the wrong expression

Answer 55

no wait, I did it right, just didn't finish :P

Answer 56

good, so (x + 3)(5x - 4) turns into 5x^2 + 11x - 12

Answer 57

this means (x + 3)(5x - 4)(2x -1) then becomes (5x^2 + 11x - 12)(2x -1)

Answer 58

so then, I took the 2x - 1 (poor guy thought I forgot about him) and did this:
2x(5x^2 + 11x -12)

Answer 59

oops, it erased some of it: (2x - 1)(5x^2 + 11x - 12)

Answer 60

THEN I did what I said earlier: 2x(5x^2 + 11x - 12)
so then I have (from that expression) 10x^3 + 22x^2 - 24x

Answer 61

Then I did the same thing only with negative 1 (-1):
-1(5x^2 + 11x - 12)
and I got negative 5x^2 (-5x^2) minus 11x plus 12 (the 12 was already negative and a negative number times a negative number equals a positive number)

Answer 62

so finally, this is what it looks like:
10x^3 + 22x^2 - 5x^2 - 24x - 11x + 12

Answer 63

so after simplifying ( 22x^2 - 5x^2 = 17^2; -24x - 11x = -35x; + 12) (phew!)
The final expression is: 10x^3 + 17^2 - 35x + 12

Answer 64

you nailed it, you totally aced this

Answer 65

I think I see what I did wrong, I subtracted 11 from 24 instead of adding them and got the wrong answer

Answer 66

The cost for solving expressions too fast

Answer 67

Math's too tricky to fast solving -_-

Answer 68

lol well it's good that you went back and figured where you went wrong

Answer 69

Yea, good ole rechecking ;)

Answer 70

Haha! I got 48/48! 100%! Thanks so much!

Answer 71

you're welcome, but it was really all you

Answer 72

even on that last one lol

Answer 73

Thanks for checking and working out that last one for me, yea well you still did check it and everything and I would've gotten one question wrong if you hadn't of pointed it out, so my virtual hat goes off to you sir!

Answer 74

lol thanks, I'm glad I could help you out

Answer 75

Thanks again, enjoy your day! May the mass times acceleration be with you! (lame science joke)

Answer 76

lol never heard that one before

Answer 77

you too