Question

1. (x + 2)2 + x (x + 1) = (x + 3)2 + x2

Answer 1

Respuesta:

            $-5$

Explicación paso a paso:

$(x+2)^{2} + x ( x+1) = (x+3)^{2} +x^{2}$

$x^{2} +4x+4 + x^{2} +x = x^{2} +6x+9 +x^{2}$

$x^{2} +x^{2} -x^{2} -x^{2} + 4x+x-6x+4-9=0$

$-x -5 = 0$

$x+5 =0$

$x = -5$