化简 -(x^2-2xy-y^2)+(5x^2-2xy-3y^2)
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化简 -(x^2-2xy-y^2)+(5x^2-2xy-3y^2)
![化简 -(x^2-2xy-y^2)+(5x^2-2xy-3y^2)](/uploads/image/z/14824603-19-3.jpg?t=%E5%8C%96%E7%AE%80+-%28x%5E2-2xy-y%5E2%29%2B%285x%5E2-2xy-3y%5E2%29)
-(x² - 2xy - y²) + (5x² -2xy - 3y²)
= -x² + 2xy + y² + 5x² - 2xy - 3y²
= 4x² - 2y²
= -x² + 2xy + y² + 5x² - 2xy - 3y²
= 4x² - 2y²
(xy-x^2)乘以(xy)/(x-y)
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
(x^2+xy/x-y)/(xy/x-y)计算
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
x^2-xy-6y^2+3xy+y+2
5x^2y/-1/2xy*3xy^2
化简:-(x^2-2xy-y^2)+(5x^2-2xy-3y^2)
化简 -(x^2-2xy-y^2)+(5x^2-2xy-3y^2)
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简
已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2