Question

Resolva
(X+5) . (X-6)=51- X

Answer 1

$x^{2} - 6X + 5X - 30 = 51 - X$

$x^{2} - X-30 =51-X$

$x^{2} -30=51$

$x^{2} =51+30$


$x^{2} = 81$

$X = +/- \sqrt{81}$

$X= +/- 9$