Question

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Answer 1

Ответ:

1)x2(x-2)-(x-2)=(x-2)(x2-1)

2)x^2=a

a2-13a+36=0

D=169-144=25

X1=(13-5)/2=4

X2=(13+5)/2=9

a1=√4=-2, a2=2,a3=√9=-3, a4=3