Question

2(х-2)+9(х-9)=2(х-9)(х-2)

Answer 1

$2(x-2)+9(x-9)=2(x-9)(x-2)$
$2x-4+9x-81=2x^2-22x+36$
$11x-85=2x^2-22x+36$
$2x^2-33x+121=0$
$D=1089-968=121=11^2$

$x<span>_{1}</span>= frac{33+11}{4} = frac{44}{4} =11$
$x_{2} = frac{33-11}{4} = frac{22}{4} =5,5$

Ответ: 11 и 5,5