1.(-2x^2y^3)^2·(xy)^3 2.3x^3-(x^2+2x)(3x-1)-3(x+5)(x-2)
问题描述:
1.(-2x^2y^3)^2·(xy)^3 2.3x^3-(x^2+2x)(3x-1)-3(x+5)(x-2)
答
(-2x^2y^3)^2*(xy)^3
=4x^4y^6*x^3y^3
=4x^7y^9
3x^3-(x^2+2x)(3x-1)-3(x+5)(x-2)
=3x^3-3x^3+x^2-6x^2+2x-3x^2-9x+30
=-8x^2-7x+30