展开 tU(t-pi)

解答

展开

t U (t - π)

t^{2} U - π t U

求解步骤

t U (t - π)

使用分配律:

a (b - c) = ab - a c

a = t U, b = t, c = π

= t U t - t U π

= tt U - π t U

tt U = t^{2} U

= t^{2} U - π t U

e x p an d (x - 5) (x + 3) (x - 2)

e x p an d (e^{x} - e^{- x}) - ln (e^{x} + e^{- x})

e x p an d (d - e) (f - g)

s im pl i f y (- 23 - 2 i)^{4}

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