(1)-2c(b^2-4ac) (2)ab(3-b)-2a(b-1/2b^2) (3)4m(2m^2-5m+1)-2m(3m-2)单项式乘多项式
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![(1)-2c(b^2-4ac) (2)ab(3-b)-2a(b-1/2b^2) (3)4m(2m^2-5m+1)-2m(3m-2)单项式乘多项式](/uploads/image/z/11687899-67-9.jpg?t=%281%29-2c%28b%5E2-4ac%29+%282%29ab%283-b%29-2a%28b-1%2F2b%5E2%29+%283%294m%282m%5E2-5m%2B1%EF%BC%89-2m%283m-2%29%E5%8D%95%E9%A1%B9%E5%BC%8F%E4%B9%98%E5%A4%9A%E9%A1%B9%E5%BC%8F)
(1)-2c(b^2-4ac) (2)ab(3-b)-2a(b-1/2b^2) (3)4m(2m^2-5m+1)-2m(3m-2)单项式乘多项式
(1)-2c(b^2-4ac) (2)ab(3-b)-2a(b-1/2b^2) (3)4m(2m^2-5m+1)-2m(3m-2)
单项式乘多项式
(1)-2c(b^2-4ac) (2)ab(3-b)-2a(b-1/2b^2) (3)4m(2m^2-5m+1)-2m(3m-2)单项式乘多项式
(1)-2c(b^2-4ac)
=-2c×b²-(-2c)×4ac
=-2b²c+8ac²
(2)ab(3-b)-2a(b-1/2b^2)
=3ab-ab²-2ab+ab²
=ab
(3)4m(2m^2-5m+1)-2m(3m-2)
=8m³-20m²+4m-6m²+4m
=8m³-26m²+8m