展开 (u-7)sqrt(u)

解答

展开

(u - 7) u

u u - 7 u

求解步骤

(u - 7) u

= u (u - 7)

使用分配律:

a (b - c) = ab - a c

u (u - 7) = u u - u \cdot 7

= u u - u \cdot 7

= u u - 7 u

e x p an d (x 32 + y 3)^{6}

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

e x p an d (x 32 + y 3)^{5}

e x p an d (csc (x) - tan (x)) (1 + cos (x))

e x p an d (2 + 3 i)^{10}