Question

A, B, and C are polynomials, where:

A = 3x – 4

B = x + 7

C = x2 + 2

What is A2 – (B + C) in simplest form?

Answer 1

2x square -25x + 7

Explanation:

a square - (b+c)

(3x-4)square - {(x+7)+(x square+2)}

3x square-2.3x.4+4 square - (x+7+x square+2)

3x square - 24x + 16 -x - 7 - x square - 2

3x square - x square -24x - x + 16-7-2

2x square-25x+7

or,

x(2x - 25)+7