1.-10x^2y-5xy^2+15xy;2.(2a+b)(2a-3b)+a(2a+b);3.5a^3b(a-b)^3-10a^4b^3(b-a)^2
问题描述:
1.-10x^2y-5xy^2+15xy;2.(2a+b)(2a-3b)+a(2a+b);3.5a^3b(a-b)^3-10a^4b^3(b-a)^2
4.(3a-4b)(7a-8b)+(11a-12b)(8b-7a);5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23:15之前
6.(x+3)^2-(x+3)
答
1.-10x^2y-5xy^2+15xy=5xy(3-2x-y;2.(2a+b)(2a-3b)+a(2a+b)=(2a+b)[(2a-3b)+a]=(2a-3b)(3a-3b)=3(2a-3b)(a-b);3.5a^3b(a-b)^3-10a^4b^3(b-a)^2=5a³b(a-b)²[(a-b)-2ab²]=5a³b(a-b)²(...