(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5) (-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
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(-b+3a)-(a-b)(2x-5y)-(3x-5y+1)2(2-7x)-3(6x+5)(-8x²+6x)-5(x²-5分之4x+5分之1)(3a²+2a-1)-2(a
(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5) (-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5)
(-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
(-b+3a)-(a-b) (2x-5y)-(3x-5y+1) 2(2-7x)-3(6x+5) (-8x²+6x)-5(x²-5分之4x+5分之1) (3a²+2a-1)-2(a²-3a-5)
(-b+3a)-(a-b)
=-b+3a-a+b
=2a
(2x-5y)-(3x-5y+1)
=2x-5y-3x+5y-1
=(2x-3x)-5y+5y-1
=-x-1
2(2-7x)-3(6x+5)
=4-14x-18x-15
=4-15-14x-18x
=-11-32x
(-8x²+6x)-5(x²-5分之4x+5分之1)
=-8x²+6x-5x²+4x-1
=-8x²-5x²+6x+4x-1
=-13x²+10x-1
(3a²+2a-1)-2(a²-3a-5)
=3a²+2a-1-2a²+6a+10
=(3a²-2a²)+(2a+6a)+(10-1)
=a²+8a+9
[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)
(1). (a+b)-(a+b)^2 (2).(y-x)^2-2(x-y) (3).2m(a-3)(1). (a+b)-(a+b)^2(2).(y-x)^2-2(x-y)(3).2m(a-3)+4(3-a)(4).4(y-x)^3-2(x-y)^2(5).(a+b)^2+2(b+a)(6).(a-b)^3-(b-a)^4
2x/x+y+2y/x+y a/a+b+b/a-b 1/3x²+2/4y-5/6xy解出来快
因式分解x(a-b)^2+y(b-a)^3
3x(a-b)+2y(b-a)
3x(a-b)-2y(b-a)分解因式
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
(x+y)(a-2b)
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)
同底数幂乘方(a-b)^5*(a-b)^10*(b-a)(a-2b)^2*(a-2b)*4*(a-b)(x-3y)^2*(3y-x)^5*(3y-x)^4
(2a+b)(2a-3b)+3a(2a+b)和x(x+y)(x-y)-x(x+y)²4a(x+y)-6x-6y和啊a(a-b)-ab+b²
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
5(a+b)(y-x)-2a(a+b)(x-y)
8a+2b+(5a-b)① (2x-3y)-(5x+4y)② (8a-7b)-2(4a-5b)