关于x的一元二次方程（m﹣1）x2+5x+m2﹣3m+2=0的常数项为0，则m等于（

关于x的一元二次方程（m﹣1）x²+5x+m²﹣3m+2=0的常数项为0，则m等于（　　）

A．

B．

C．

1或2

D．

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关于x的一元二次方程（m﹣1）x2+5x+m2﹣3m+2=0的常数项为0，则m等于（

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