展开 (x^3-7x^2)(1/x-6)

解答

展开

(x^{3} - 7 x^{2}) (\frac{1}{x} - 6)

- 6 x^{3} + 43 x^{2} - 7 x

求解步骤

(x^{3} - 7 x^{2}) (\frac{1}{x} - 6)

Apply FOIL method

(x^{3} - 7 x^{2}) (\frac{1}{x} - 6) : - 6 x^{3} + 43 x^{2} - 7 x

= - 6 x^{3} + 43 x^{2} - 7 x

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

e x p an d (12 y^{2} - 6 x y^{2}) d x + (3 x y - 4 x^{2}) d y

e x p an d x (x - 1) d x

e x p an d 3 (4 m + 6 n - 2 p)

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