Question

решите
(5−x) (2, 2−x) − (x+1)2 = −8,

Answer 1

Ответ:

$x=1\frac{22}{23}$

Объяснение:

$(5-x)(2,2-x)-(x+1)^2=-8\\(11-2,2x-5x+x^2)-(x^2+2x+1)=-8\\(11-7,2x+x^2)-(x^2+2x+1)=-8\\11-7,2x+x^2-(x^2+2x+1)=-8\\11-7,2x+x^2-x^2-2x-1=-8\\-9,2x+10=-8\\-9,2x=-8-10\\-9,2x=-18\\x=\frac{-18}{-9,2}\\x=\frac{18*10}{1*92}\\x=\frac{9*10}{46}\\\x=\frac{9*5}{23}\\x=\frac{45}{23}\\x=1\frac{22}{23}$