计算:[(x+y)^2n]^4÷(-x-y)^2n+1
计算(x-y)^3n*(y-x)^2n÷(y-x)^5n(n为正整数,且x≠y)
计算(-3x^n y)^2乘以2x^(n-1)y的结果是
单项式除以单项式 -x^n-2y^n+1÷(-4x^n-4y^n-3)
(1)[(x+y)^2n]^4除以(-x-y)^2n+1(n是正整数)
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
分解因式:-2X^(5n+1)Y^n+4X^(3n+1)Y^(n+2)-2X^(n+1)Y^(n+4)
(x-2y)2n÷(2y-x)2n-1+(2x-y)(-2x-y)+(x-y)(-x+y)
1.计算1(m+2n)(m-2n);2(2n+5)(n-3);3(x+2y)²;4(2x+b)(3x+d);
利用平方差公式计算:(x^2-y^2)×(x^2+y^2)×(x^4+y^4)…(x^2n+y^2n)
计算:(y-x)的立方*(x-y)的n次方+2(x-y)的n+1次方*(y-x)的平方
计算一,y-x分之x+y 加x-y分之y剪y-x分之2x-y= 二n-m分之m+2n加n-m分之n剪n-m分之2n=__
计算(y-2x)的三次方(2x-y)的2n+1次方除以(y-2x)的2n+2次方 (n为正整数)