(a-b)(5x-3y)-(b-a)(3x+5y)
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(a-b)(5x-3y)-(b-a)(3x+5y)
(a-b)(5x-3y)-(b-a)(3x+5y)
(a-b)(5x-3y)-(b-a)(3x+5y)
(a-b)(5x-3y)-(b-a)(3x+5y)
=(a-b)(5x-3y)+(a-b)(3x+5y)
=(a-b)(5x-3y+3x+5y)
=2(a-b)(4x+y)
[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x 还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)
已知2A-B=x,2B-A=y,求3A+5B
(a-b)(x+3)-(b-a)(y+2)+(a-b)(5-z)
因式分解 3a(x-y)-5b(y-x)a^3b-25ab^3
(a-b)(5x-3y)-(b-a)(3x+5y)
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用提取公因式:m(a-b)+n(b-a) 5(a-b)的2n次方x-(b-a)2n次方y x+y-(2x-y)(b-a) a(x+y)-2b(x+y)+3c(x+y)(a-b)的2次方(a+b)的2次方-(b-a)的2次方(b+a)的2次方 2a(x+y-z)+3b(z-x-y) 2a(x+y-z)+3b(z-x-y)-c(x+y-z)还有 m(a-b)+n(b-a) 5(a-b)的2
A={y|y=-4x+6},B={x|y=5x-3},求A∩B.
几道 数学题急啊 对了再加20分(x+y)^2-(x+y)^3(x-y)^2-(x-y)^3 (x-y)^2-(y-x)^32(x-y)-3(y-x)^24ab(a+b)^2-6a^2b(a+b)(x+y)(x-y)-(x+y)^28a(x-y)^2-4b(y-x)a=-5 a+b+c=-5.2求代数式a^2(-b-c)-3.2a(c+b)的值
(x+y)^2+2x+2y,(a-b)^3-2b(b-a)^2.
x+y-(2x-y)(x+y)=?12(a^2-b^2)^2-3(a^2+b^2)(a+b)^2等于多少(2a-b)(2a+3b)+3a(b-2a)=-(2a-b)( ),a(x-3)(5-x)+b(3-x)(x-5)=( )(x-3)(a+b)代数式15x^3y^3(x-y),6x^2y^2(y-x),-120x^3y^3(x-y)(x+y)的公因式是?a-b+k(b-a)=( )(k-1)a(b-c)+c-b=(b-c)