ПОМОГИТЕ!!!!!!!! 2) 2x-(x+1)²=3x²-6 3)x²-8x+7=0

Question

ПОМОГИТЕ!!!!!!!! 2) 2x-(x+1)²=3x²-6 3)x²-8x+7=0

Answer 1

3)x^2-8x+7=0
Дискриминант=64-28=36
x1=8+6/2 x2=8-6/2
x1=7 x2=1