Question

$\frac{x {}^ {2} - 5x }{6} + 1 = \frac{2x + 11}{3}$
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Answer 1

Resposta:

Explicação passo-a-passo:

_x² - 5x_ + 1 = _2x + 11_

     6                      3    

m.m.c ⇒ 6

(x² - 5x) + 1(6) = (2x + 11)(2)

x² - 5x + 6 = 4x + 22

x² -5x + 6 - 4x - 22 = 0

x² - 9x - 16 = 0

x = {9 ± √[9² - 4(1)(-16)]}/2(1)

x = [9 ± √(81+ 64)[/2

x = (9±√145)/2

x' = (9+√145)/2

x'' = (9 - √145)/2