2х-(Х+1)^2=3х^2-5 помогите

Question

2х-(Х+1)^2=3х^2-5 помогите

Answer 1

2х-(Х+1)²=3х²-5
2x-(x²+2x+1)=3x²-5
2x-x²-2x-1=3x²-5-x²-1=3x²-5
3x²+x²-5+1=0
4x²-4=0
4(x²-1)=0
4(x-1)(x+1)=0
x₁=1
x₂=-1
Ответ:    x₁=1, x₂=-1

Answer 2

2x-x^2-2x-1-3x^2+5=0
-4x^2+4=0
-4x^2=-4
4x^2=4
x^2=1
x=1
x=-1