Asked by Bridget

If A=3x+4 and B=x^2+2 and C=x^2+3x-2, find the following:
1. AC+B
2. (A+B)(B-C)
3. ABC

11 years ago

Answered by Steve

just substitute in. For example,

ABC = (3x+4)(x^2+2)(x^2+3x-2)
= 3x^5+13x^4+12x^3+18x^2+12x-16

what do you get for the others?

11 years ago

Answered by bridget

1. 17x^2+6x-6

2. 3x^3+9x^2+18x

did you get the same?

11 years ago

Answered by Steve

I get

AC+B = 3x^^3+14x^2+6x-6
AC has to be 3rd degree, since A is 1 and C is 2

(A+B)(B-C)
= -3x^3-5x^2-6x+24

Somewhere you're messing up. Visit calc101.com and click on the "long multiplication" link, and it will show all the details of polynomial multiplication.

11 years ago

There are no AI answers yet. The ability to request AI answers is coming soon!