计算,(5y+1)(5y²—5y+1)—5(1+2y)(1—2y),

问题描述:

计算,(5y+1)(5y²—5y+1)—5(1+2y)(1—2y),

(5y+1)(5y²—5y+1)—5(1+2y)(1—2y)
=25y³-25y²+5y+5y²-5y+1-5+20y²
=25y³-4