展开 (8,6)(-9,-9)(x,-8)

解答

展开

(8, 6) (- 9, - 9) (x, - 8)

- 9 (8 \cdot 6,), x, 9, 8 - 9 (8 \cdot 6,) x, 9 \cdot 8

求解步骤

(8, 6) (- 9, - 9) (x, - 8)

= (8 \cdot 6,) (- 9, - 9) (, x - 8)

乘开

(- 9, - 9) (x, - 8) : - 9, x, 9, 8 - 9 x, 9 \cdot 8

= (8, 6) (- 9, x, 9, 8 - 9 x, 9 \cdot 8)

乘开

(8, 6) (- 9, x, 9, 8 - 9 x, 9 \cdot 8) : - 9 (8 \cdot 6,), x, 9, 8 - 9 (8 \cdot 6,) x, 9 \cdot 8

= - 9 (8 \cdot 6,), x, 9, 8 - 9 (8 \cdot 6,) x, 9 \cdot 8

e x p an d (r cos (θ) - 1)^{2}

s im pl i f y \frac{1}{( s - 2 i ) ^{2}} + \frac{1}{( s + 2 i ) ^{2}}

e x p an d 224 (s + s^{'})^{9}

e x p an d x + 2 (3 x - 2)

e x p an d (- 9, 6) y (- 7, - 8)