Question

Sendo A=(x+2)^2, B=(x+3)(x-3) e C=(x-1)^2, determine a+b+c de forma simplificada.

Answer 1

$a = x^{2} + 4x + 4$
$b = x^{2} - 9$
$c= x^{2} - 2x +1$
$x^{2} + 4x + 4 + x^{2} - 9 + x^{2} - 2x + 1$
$3x^{2} + 2x - 4$
Isso se (x + 2)^2 for $(x + 2)^{2}$  

Answer 2

A + B + C = (x+2)^2 + (x+3)(x-3) + (x-1)^2

x^2 + 4x + 4 + x^2 - 9 + x^2 - x + 1

3x^2 + 3x - 4