Question

Помогите!
1) (2x+7)(7-2x)=49+X(x+2)
2) 1/ X+2/ X+2=1
3) X^5-2X^4+ X^3-2X^2+X-2=0

Answer 1

1)49-4x^2=49+x^2+2x

5x^2+2x=0

x(5x+2)=0

x=0 x=-0,4

2)