-3a平方b(y+1次方)与a平方b(y+1次方)次方是同类项
即:-3a²b,a²b^(y+1) ;y+1=1 y=0
(2x²-3xy+6y)-m(3m²-xy+9y)=2x²-3m³
3/5(x-5)平方+m=0
m=-3/5(x-5)平方代入2x²-3m³即可
-3a平方b(y+1次方)与a平方b(y+1次方)次方是同类项
即:-3a²b,a²b^(y+1) ;y+1=1 y=0
(2x²-3xy+6y)-m(3m²-xy+9y)=2x²-3m³
3/5(x-5)平方+m=0
m=-3/5(x-5)平方代入2x²-3m³即可