2x(x-3)+x=32(x-2)²=18 x²2x-15=04(x-1)²=9(x-5)
1个回答
2x(x-3)+x=3
2x²-6x+x-3=0
2x²-5x-3=0
(x-3)(2x+1)=0
x1=3,x2=-1/2
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