作业帮数学题不会求解答明天要交了看不懂
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/07/17 23:37:52
数学题不会求解答明天要交了看不懂
9.原式=(2r+s)(2r-s+r-s)=(2r+s)*(3r-2s)=6r^2-sr-2s^2
10.原式=（a+b)(a-b)(a+b-a+b)=2b(a+b)(a-b)
11.原式=a(b+c)(2ab+ac+1)
12.原式=t^2(3r+2s)*(2tr+ts+1)
13.原式=(2a+1)(a+3-a+3)=6(2a+1)
14.原式=(3x+2y)(x+2y+x-2y)=2x(3x+2y)
15.原式=3a(5a+2b)(3a-5b-12a^2+3ab)=-3a(5a+2b)(12a^2-3a+5b-3ab)
16.原式=2m(3n-2m)(n+m)(3+4m)
17.原式=5xy(3x+2y)(x+3x-9y)=5xy(3x+2y)(4x-9y)
10.原式=（a+b)(a-b)(a+b-a+b)=2b(a+b)(a-b)
11.原式=a(b+c)(2ab+ac+1)
12.原式=t^2(3r+2s)*(2tr+ts+1)
13.原式=(2a+1)(a+3-a+3)=6(2a+1)
14.原式=(3x+2y)(x+2y+x-2y)=2x(3x+2y)
15.原式=3a(5a+2b)(3a-5b-12a^2+3ab)=-3a(5a+2b)(12a^2-3a+5b-3ab)
16.原式=2m(3n-2m)(n+m)(3+4m)
17.原式=5xy(3x+2y)(x+3x-9y)=5xy(3x+2y)(4x-9y)