1.x²+2x+3=0 2.X²+6X-5=0 3.x²-4x+3=0 4.2y=3y²急,我实在是忙

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1.x²+2x+3=0 2.X²+6X-5=0 3.x²-4x+3=0 4.2y=3y²急,我实在是忙

1.x²+2x+3=0 2.X²+6X-5=0 3.x²-4x+3=0 4.2y=3y²急,我实在是忙
1.x²+2x+3=0 2.X²+6X-5=0 3.x²-4x+3=0 4.2y=3y²
急,我实在是忙

1.x²+2x+3=0 2.X²+6X-5=0 3.x²-4x+3=0 4.2y=3y²急,我实在是忙
1.德尔塔

1 (x+1)(x+2)=0 x1=-1 x2=-2
2 (x-1)(x-5)=0 x1=1 x2=5
3 (x-1)(x-3)=0 x1=1 x2=3
4 y(3y-2)=0 y1=0 y2=2/3