展开 (-5,-7,1)left(1,0,-3)

解答

展开

(- 5, - 7, 1) l e f t (1, 0, - 3)

- 5 e l f t, 1, 0, 5, 3 - 7 e l f t, 1 \cdot 1, 0, 7, 1 \cdot 3

求解步骤

(- 5, - 7, 1) l e f t (1, 0, - 3)

= e (- 5, - 7 \cdot 1,) (1 \cdot 0,, - 3) l f t

乘开

(- 5, - 7, 1) (1, 0, - 3) : - 5, 1, 0, 5, 3 - 7, 1 \cdot 1, 0, 7, 1 \cdot 3

= l e f t (- 5, 1, 0, 5, 3 - 7, 1 \cdot 1, 0, 7, 1 \cdot 3)

乘开

l e f t (- 5, 1, 0, 5, 3 - 7, 1 \cdot 1, 0, 7, 1 \cdot 3) : - 5 e l f t, 1, 0, 5, 3 - 7 e l f t, 1 \cdot 1, 0, 7, 1 \cdot 3

= - 5 e l f t, 1, 0, 5, 3 - 7 e l f t, 1 \cdot 1, 0, 7, 1 \cdot 3

s im pl i f y (\frac{9}{x - 12} + 3 (100 - x)) (x - 12)

e x p an d \frac{a x ^{2} + b x + c}{( x ^{2} + 1 ) ( x - 3 )}

s im pl i f y 12 (lo g_{a} (b) + lo g_{b} (c))

e x p an d 2^{2} + 3^{2}

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