Question

(x+4)(x+5)=(x+2)(x+6)

Answer 1

Respuesta:

$(x + 4)(x + 5) = (x + 2)(x + 6) \\ {x}^{2} + 5x + 4x + 20 = {x}^{2} + 6x + 2x + 12 \\ {x}^{2} + 9x + 20 = {x}^{2} + 6x + 2x + 12 \\ {x}^{2} + 9x + 20 = {x}^{2} + 8x + 12 \\ 9x + 20 = 8x + 12 \\ 9x + 20 - 8x = 12 \\ x + 20= 12 \\ x = 12 - 20 \\ x = - 8$

Explicación paso a paso: