1/2*x*(-1/2x+4)=5/4*3怎么化简

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1/2*x*(-1/2x+4)=5/4*3怎么化简
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1/2*x*(-1/2x+4)=5/4*3怎么化简
1/2*x*(-1/2x+4)=5/4*3怎么化简

1/2*x*(-1/2x+4)=5/4*3怎么化简


1/2*x*(-1/2x+4)=5/4*3
-1/4x^2+2x=15/4
-x^2+8x=15
x^2-8x+15=0
(x-3)(x-5)=0
x1=3
x2=5
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