化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 05:10:58
化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)化简:f(y)=(25y^2-5y+1)(5y+1)-5

化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)
化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)

化简:f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)
第一个是立方和
所以f(y)=(5y)³+1³-5+20y²
=125y³+20y²-4

f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)
=125y³+1-5+20y²
=125y³+20y²-4

f(y)=(25y^2-5y+1)(5y+1)-5(1-4y^2)
=(5y)^3+1-5+20y^2
=125y^3+20y^2-4

f(y)=125y^3+20y^2-4