化简 sqrt(a)(sqrt(a)-b)

解答

化简

a (a - b)

a - b a

求解步骤

a (a - b)

使用分配律:

a (b - c) = ab - a c

a (a - b) = a a - a b

= a a - a b

a a = a

- a b = - b a

= a - b a

e x p an d - 2 (x ln (x) - x)

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

e x p an d (10 - 5 e^{- x})^{2}

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

s im pl i f y (\frac{3 x ^{2}}{4} - 2 x y^{3}) (\frac{3 x ^{2}}{4} + 2 x y^{3})