Question

me ajudem x ( x + 4 )+ x ( x + 2 ) = 2 x ² + 12

Answer 1

x ( x + 4 )+ x ( x + 2 ) = 2 x ² + 12

x^2 + 4x + x^2 + 2x = 2x^2 + 12

2x^2 + 6x = 2x^2 + 12

6x + 2x^2 - 2x^2 = 12

6x = 12

x = 12/6

x = 2