Posted by Randy on Monday, April 16, 2012 at 7:34pm.
3(x-2)-9(x^2+7x+4)-5(x+8)
3x-6-9x^2-63x-36-5x-40
-9x^2-65x-82
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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