2x2?10x?3 (x+5)2=16 2(2x-1)-x(1-2x)=0
5x2 - 8(3 -x)2 –72=0 3x(x+2)=5(x+2) x2+ 2x + 3=0
x2+ 6x-5=0
2x2+3x+1=0
7x2-4x-3 =0
(3x?2)2?(2x?3)2
3x 2+8 x-3=0
-3x 2+22x-24=0 3x2+2x-1 =0 -x2-x+12 =0 x2
-2x-4=0 (x+1)(x+8)=-12
(3x+2)(x+3)=x+14 x2-2x-1 =0 5x2-3x+2 =0 4?x?3?2?x?x?3??0 1-3y)2+2(3y-1)=0 6
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一元二次方程的解法综合练习题及答案.doc2013.9.10.1
2x2?10x?3(x+5)2=162(2x-1)-x(1-2x)=05x2-8(3-x)2–72=03x(x+2)=5(x+2)x2+2x+3=0
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