Posted by **Randy** on Monday, April 16, 2012 at 7:34pm.

Consider the following expression.

3(x - 2) - 9(x**2 + 7 x + 4) - 5(x + 8)

(a) Simplify the expression.

- ALGEBRA -
**bell**, Wednesday, April 18, 2012 at 2:23am
3(x-2)-9(x^2+7x+4)-5(x+8)

3x-6-9x^2-63x-36-5x-40

-9x^2-65x-82

- ALGEBRA -
**megan <3**, Wednesday, April 25, 2012 at 10:59pm
you have to know the distributive property in order to do this one.

x(a+b)= xa+xb

so first, to make it easier, separate it. Like this:

3(x-2)

-9(x**2+7x+4)

-5(x+8)

Lets start with 3(x-2) 3*x is 3x and 3*-2 is -6... 3x-6

-9*x**2 is -9x**2 and -9*7x is -63x and -9*4 is -36 so this is -9**2-63x-36

-5(x+8) -5*x+ =5x and -5*8+ -40!!!!!

so you add these together to get

3x-6-9x**2-63x-36-5x-40

then you have to add all the like monomials together, which hopefully you can do but i'll explain it nonetheless.

63x+3x-5x= -65x

-6-36-40= -82

then -9x**2

putting these together, we get...(drum roll please :P)

-9x**2-65x-82!!!!!!!!

im tired. hope this helped.

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