展开 (6-iright)+left(7+3iright)(12-3i)+(7+3i)

解答

展开

(6 - i r i g h t) + l e f t (7 + 3 i r i g h t) (12 - 3 i) + (7 + 3 i)

(- 36 e l r g h t^{2} f + r g h t + 84 e lt f + 13) + (3 - 21 l e t f + 9 l er g h t^{2} f) i

求解步骤

(6 - i r i g h t) + l e f t (7 + 3 i r i g h t) (12 - 3 i) + (7 + 3 i)

= (6 - ii r g h t) + e (12 - 3 i) lt f (7 + 3 ii r g h t) + (7 + 3 i)

乘开

l e f t (7 + 3 i r i g h t) (12 - 3 i) : e lt f (84 - 36 r g h t) + e i lt f (- 21 + 9 r g h t)

= (6 - i r i g h t) + e lt f (84 - 36 r g h t) + e i lt f (- 21 + 9 r g h t) + (7 + 3 i)

乘开

e lt f (84 - 36 r g h t) : 84 e lt f - 36 e l r g h t^{2} f

= (6 - i r i g h t) + 84 e lt f - 36 e l r g h t^{2} f + e i lt f (- 21 + 9 r g h t) + (7 + 3 i)

乘开

e i lt f (- 21 + 9 r g h t) : i (- 21 e lt f + 9 e l r g h t^{2} f)

= (6 - i r i g h t) + 84 e lt f - 36 e l r g h t^{2} f + i (- 21 e lt f + 9 e l r g h t^{2} f) + (7 + 3 i)

化简

(6 - i r i g h t) + 84 e lt f - 36 e l r g h t^{2} f + i (- 21 e lt f + 9 e l r g h t^{2} f) + (7 + 3 i) : (- 36 e l r g h t^{2} f + r g h t + 84 e lt f + 13) + i (3 - 21 e lt f + 9 e l r g h t^{2} f)

= (- 36 e l r g h t^{2} f + r g h t + 84 e lt f + 13) + i (3 - 21 e lt f + 9 e l r g h t^{2} f)

= (- 36 e l r g h t^{2} f + r g h t + 84 e lt f + 13) + (3 - 21 l e t f + 9 l er g h t^{2} f) i

e x p an d \frac{( x - 5 ) ^{2} x}{2}

e x p an d \frac{1}{( s - 2 ) ( s ^{2} - 4 s )}

e x p an d \frac{( ( x - 2 ) ^{5} )}{5}

e x p an d (x^{2} + 3 x - 1)^{7} (2 x - 3) d x

e x p an d lo g_{5} 3 \frac{( x + 9 ) ^{9}}{5}