Question

x( x+4)+x(x+2)= 2x²+12​

Answer 1

Resposta:

$x=2$

Explicação passo-a-passo:

$x\left(x+4\right)+x\left(x+2\right)=2x^2+12\\\\2x^2+6x=2x^2+12\\\\2x^2+6x-2x^2=2x^2+12-2x^2\\\\6x=12\\\\\frac{6x}{6}=\frac{12}{6}\\\\x=2$

Answer 2

${x}^{2} + 4x + {x}^{2} + 2x = {2x}^{2} + 12 \\ {2x}^{2} + 6x = {2x}^{2} + 12 \\ {2x}^{2} - {2x}^{2} + 6x = 12 \\ 6x = 12 \\ x = 2$