展开-y(y-e^2)

解答

展开

- y (y - e^{2})

- y^{2} + e^{2} y

求解步骤

- y (y - e^{2})

使用分配律:

a (b - c) = ab - a c

a = - y, b = y, c = e^{2}

= - yy - (- y) e^{2}

使用加减运算法则

- (- a) = a

= - yy + e^{2} y

yy = y^{2}

= - y^{2} + e^{2} y

e x p an d (1 - w + w^{2} - 1)^{2}

e x p an d \frac{( x + 1 ) ( x - 1 ) ( x - 2 ) ( x - 3 )}{6}

e x p an d 2 (x_{1} - x_{2} - x_{3})^{2}

e x p an d \frac{( x - 1 )}{( x - 2 ) ^{2}}

e x p an d ((2 + cos (u) sin (u)))^{2}