展开 y(6,-6)(20,-20)

解答

展开

y (6, - 6) (20, - 20)

6 y, 20, - 6 y, 20 - 6 \cdot 20 y, 6 \cdot 20

求解步骤

y (6, - 6) (20, - 20)

= (6, - 6) (20, - 20) y

乘开

(6, - 6) (20, - 20) : 6, 20, - 6, 20 - 6 \cdot 20, 6 \cdot 20

= y (6, 20, - 6, 20 - 6 \cdot 20, 6 \cdot 20)

乘开

y (6, 20, - 6, 20 - 6 \cdot 20, 6 \cdot 20) : 6 y, 20, - 6 y, 20 - 6 \cdot 20 y, 6 \cdot 20

= 6 y, 20, - 6 y, 20 - 6 \cdot 20 y, 6 \cdot 20

e x p an d \frac{d x}{d} (x = 3 cos (y) - sin (y) y_{2})

s im pl i f y (\frac{8 u}{5} + \frac{3 v ^{2}}{8}) (\frac{8 u}{5} - \frac{3 v ^{2}}{8})

s im pl i f y (i - x)^{2} + c (x - c)^{2}

e x p an d (1 + \frac{3 i}{n})^{2}

e x p an d (1 + 5)^{14}