4X²-3X=0 4X²-25=0 9X²+12X+4=0 15X²+6=X+8
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4X²-3X=0 4X²-25=0 9X²+12X+4=0 15X²+6=X+8
4X²-3X=0 4X²-25=0 9X²+12X+4=0 15X²+6=X+8
4X²-3X=0 4X²-25=0 9X²+12X+4=0 15X²+6=X+8
4X²-3X=0
x(4x-3)=0
x=0或x=3/4
4X²-25=0
x²=25/4
x=5/2或-5/2
9X²+12X+4=0
(3x+2)²=0
x1=x2=-2/3
15X²+6=X+8
15x²-x-2=0
(3x+1)(5x-2)=0
x=-1/3或x=2/5
1 x=0,x=3/4
2 x=正负5/2
3 x=-2/3
4 x=-1/3 x=2/5