Question

Really need help with 3 questions!
The correct simplification of the expression -6x^2(4x - 7x^2 - 2)?
The correct simplification of the expression (-2x + 6y)(4x - 6y)?
The correct simplification of the expression (3x - 6)(2x^2 - 4x - 5)?

Answer 1

a(b+c) = ab + ac

(a+b)(c+d) = ac + ad + bc + bd

Answer 2

also you'll need..
\[\LARGE x^a\cdot x^b=x^{a+b}\]

Answer 3

Can you tell me the answer please? This is for a study guide and if I fail the test, I have to do Algebra again

Answer 4

well you have to try at least, show us what you've done so far, then we'll correct your mistakes. Deal ? ;)

Answer 5

Okay hold on

Answer 6

I know the first one deals with the Power of a Power rule so it should equal
42x^4 + 24x^3 - 12x^2.
The second one is the Products of Powers so it should be -8x^2 + 36xy - 36y^2.
The last one is the one I am having a lot of trouble with. I am terrible at this :(

Answer 7

the first one is close just look again signs minus and plus, ... the second one it's correct well done.

Answer 8

Okay here is the oter answer I got for the first -42x^4 + 24x^3 - 12x^2

Answer 9

\[\Large -6x^2(4x-7x^2-2)=-24x^3+42x^4+12x^2\]

because ... \[\LARGE (-)\cdot (-)=+\]

Answer 10

that was the first one... THE SECOND ONE YOU HAVE IT CORRECT ... now I'll give you a hint on the third one .

Answer 11

I know my last answer is wrong 6x^3 + 9x + 30

Answer 12

is this your answer for the third question ?

Answer 13

yes

Answer 14

hmmm ... hold on

Answer 15

\[\Large (3x-6)(2x^2-4x-5)=\]
\[\Large =6x^3-12x^2-15x-12x^2+24x+30\]

can you continue ?

Answer 16

ohhh! I see what I did wrong! Thanks!

Answer 17

... Give me your final answer , I want to be sure it's correct ! ;)

Answer 18

okay give me a sec

Answer 19

6x^3 - 24x^2 + 39x + 30?

Answer 20

why 39x ?? ... look again signs carefully !

Answer 21

can you find the mistake ?

Answer 22

Aww can't! I have been working on this study guide all night

Answer 23

-15x+24x= ?

Answer 24

ohhh i see 6x^3 - 24x^2 + 9x + 30

Answer 25

That's correct. WELL DONE ! ;) ...

Answer 26

thank you so much!

Answer 27

Glad to help, and you're welcome ;)