Question

(x - 4)(1 + x) = 0.​

Answer 1

Ответ:

x+x2-4-4x=0

x2-3x-4=0

d=9+16=25

x1=-3-5:2=-4

x2=-3+5:2=1

Answer 2

х-4=0

х1=4

1+х=0

х2=-1

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