Question

(×+7)(×+6)+12=(×+5)(×+9)
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Answer 1

Respuesta:

(×+7)(×+6)+12=(×+5)(×+9)

${x}^{2} + 6x + 7x + 42 + 12 = {x}^{2} + 9x + 5x + 45$

$6x + 7x + 42 + 12 = 9x + 5x + 45$

$13x + 54 = 14x + 45$

$13x - 14x = 45 - 54$

$- x = - 9$

$respusta$

$x = 9$