2(х - 2)(х + 2) - (х - 1)2 = х2 - 5

Question

2(х - 2)(х + 2) - (х - 1)2 = х2 - 5

Answer 1

Ответ:

1) 2(x-2)=2x-5

2x-4=2x-5

2x-2x=-5+4

x=-1

2)x+2=2x-5

2x-x=2+5

x=7

3)2(x-1)=2x-5

2x-2=2x-5

2x-2x=-5+2

x=-3