Question

请大家帮忙做几道初三的题，谢谢！

x²+4x=2 5x²-4x-12=0 4x²+4x+10=1-8x
x²-6x+1=0 2x²-x=6 4x²-3x-1=x-2

Answer 1

x^2+4x=2
(x+2)^2=6
x+2=√6或x+2=-√6
x=√6-2或x=-√6 -2

5x^2-4x-12=0
(5x+6)(x-2)=0
x=-6/5或x=2

4x^2+4x+10=1-8x
4x^2+12x+9=0
(2x+3)^2=0
2x+3=0
x=-3/2

x^2-6x+1=0
(x-3)^2=8
x-3=2√2或x-3=-2√2
x=3+2√2或x=3-2√2

2x^2-x=6
2x^2-x-6=0
(2x+3)(x-2)=0
x=-3/2或x=2

4x^2-3x-1=x-2
4x^2-4x+1=0
(2x-1)^2=0
2x-1=0
x=1/2

Answer 2

1.x=正负根号6-2 2.x=2或-5分之6 3.x=正负2分之3倍根号2-2分之3
4.x=正负2倍根号2+3 5.x=2或-2分之3 6.x=2分之1