Question

(3-x)в квадрате+2x=x(x+1) Решить уровнение

Answer 1

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Answer 2

(3-x)2+2x=x(x+1)

(3-x)2+2x-x(x+1)=0

(9-6х+x2)+2x-(x2+х)=0

9-6х+x2+2x-x2-х=0

-5х+9=0

-5х=-9

х=9/5

х=1.8