计算:(a+2)(a-2)(a^4+4a^2+16) 和 (x^2+2xy+y^2)(x^2-xy+y^2)
计算(1)x/x+y-x/x-y (2)a+2+4/a+2 (3)x^2-y^2/xy÷(x+y)
【分解因式】 x²-xy+4分之1y² x²y-2xy²+y³ a(x
3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy
计算(a-2)(a的平方+2a+4)和(2x-y)(4x的平方+2xy+y的平方)
(1)1-a/a*a-2a+1 (2)3x-4y/8xy-6x*x (3)2x*xy(x-y)/12xy*y(y-x)
计算2x²-5xy+6y²加多项式A时,误算成减去A,错误结果为7y²+4xy+4x
计算:x-y分之x - x+y分之y + x²-y²分之2xy 计算:a-1分之2a+2 除以 (a
分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+
因式分解:4a^2(x-y)+9(y-x) -4x^2y^2+x^3y+4xy^3
(x^2+xy/x-y)/(xy/x-y)计算
已知A=5x^2y-3xy^2+4xy,B=7xy^2-2xy+x^2y.
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B