计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=

来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 13:59:10
计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
x){nu5 54L+t45*t5u5+t AlM[ #M{:*1Ԕ --\]MR>M/p535 Vhyچ@HޤB%h#DH&ҶZTgkah_\g'v

计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=

计算(1).(5x-2)(x-3)-(3x-1)(x-4)= (2).(x+3)(x²+9)(x-3)=
(5x-2)(x-3)-(3x-1)(x-4)
=5x^2-2x-15x+6-3x^2+x+12x-4
=2x^2-4x+2
(x+3)(x²+9)(x-3)
=(x^2-9)(x^2+9)
=x^4-81