Question

Please help... 5 questions (i did 23 of them)
I cant figure them out!!! Fan and medal!

Answer 1

Simplify: (3a – 4b)(a + b)

A.
3a2– ab – 4b2

B.
3a2 – 7ab – 4b2

C.
3a2 – 12ab – 4b2

D.
3a2 + ab – 4b2

Answer 2

3a*a=3a^2
-4b*a=-4ba
3a*b=3ab
-4b*b=-4b^2
We combine like terms, and the final answer is 3a^2-ab-4b^2

Answer 3

i kept on getting b -_- thank you!

Answer 4

You're welcome, do you understand how I got my answer?

Answer 5

well i was doing it wrong obviously but i do not quite understand please explain further.

Answer 6

Okay, so if we had a problem with multiplying (a+b)(c-d)
The first step would be a*c=ac
Then we would multiply b*c=bc
Then we would multiply a*-d=-ad
Then we would multiply b*-d=-bd
Then we combine like terms and put them all together, but there are no like terms in this example so we end up with ac+bc-ad-bd

Answer 7

ahhh i see thankyou for explainting it in detail :)

Answer 8

by the way im japanese and im learning english... am i doing ok?

Answer 9

Yes, I had no idea English was not your first language!

Answer 10

thank you!

Answer 11

i am translating these problems by the way

Answer 12

Simplify.
(4a – 3)2

A.
8a2 – 24a + 6

B.
162a – 12 + 9

C.
16a2 – 9

D.
16a2 – 24a + 9

Answer 13

Simplify.
(4a – 3)^2

A.
8a^2 – 24a + 6

B.
16^2a – 12 + 9

C.
16a^2 – 9

D.
16a^2 – 24a + 9

Answer 14

i added carats so its easier

Answer 15

Okay, well the exponent goes to each value inside the parentheses so it will look like this: 4^2x^2-3^2
We then simplify the equation 4^2=16 -3^2=9 (because we are multiplying -3 by -3 it becomes positive 9 because a negative * negative=positive
Our simplified equation will be 16a^2+9

Answer 16

i got c so i think i got it right i mean, i worked the problem 2 times and got c

Answer 17

Yeah you're right it is 16a^2-9, sorry.

Answer 18

thanks!

Answer 19

Simplify.
(x – 5)(x2 – 2x – 6)

A.
x3 + x2 – 4x + 30

B.
x3 – 5x2 + 10x + 30

C.
x3 – 7x2 + 16x + 30

D.
x3 – 7x2 + 4x + 30

Answer 20

Going through the same process that I showed you, I got x^3-7x^2+4x+30

Answer 21

i got a so i was checking

Answer 22

I am pretty sure that the answer is D.

Answer 23

mk

Answer 24

one last q

Answer 25

Find the volume of the box. Use the formula V = lwh.

http://static.k12.com/calms_media/media/330000_330500/330323/1/576833d32994807ff1480a750d977fb89e6b2e71/MS_ALG_S2_03_06_test_Q5_question.gif


A.
6x3 – 2

B.
6x3 + 11x2 – 3x – 2

C.
6x2– x – 1

D.
6x2 – 13x2 – 3x – 2

Answer 26

I got 6x^3+11x^2-3x-2 (letter B.)