Question

(X+7) (x+6) + 12 = (x+5) (x+9)

Answer 1

Respuesta:

(X+7)(X+6) + 12 = (X+5)(X+9)

(X)^2+(7+6)X+(7×6) = (X)^2+(5+9)X+(5×9)

X^2+13X+42 = X^2+15X+45

(1-1)X^2+13X+42 = 15X+45

13X+42 = 15X+45

42-45 = 15X-13X

-3 = 2X

-3 = 2X

-3/2 = 2X/2.

-3/2 = X

X = -3/2

Explicación paso a paso: