Question

(x+2)²-(x-3).(x+3)=-3

Answer 1

\(\Leftrightarrow x^2+4x+4-x^2+9=-3\Leftrightarrow4x=-16\Leftrightarrow x=-4\)

Answer 2

\(\left(x+2\right)^2-\left(x-3\right).\left(x+3\right)=-3\)

\(x^2+4x+4-\left(x-3\right)\left(x+3\right)=-3\)

\(x^2+4x+4-x^2+9=-3\)

\(4x+4+9=-3\)

\(4x+13=-3\)

\(4x=-3-13\)

\(4x=-16\)

\(x=-16:4\)

\(x=-4\)