化简 (asqrt(a)-bsqrt(b))(asqrt(b)+bsqrt(b))

解答

化简

(a a - b b) (a b + b b)

a^{2} a b + ab a b - a b^{2} - b^{3}

求解步骤

(a a - b b) (a b + b b)

Apply FOIL method

(a a - b b) (a b + b b) : a^{2} a b + ab a b - a b^{2} - b^{3}

= a^{2} a b + ab a b - a b^{2} - b^{3}

e x p an d \frac{( x - 2 ) ^{2} ( x + 1 )}{( x - 5 )}

s im pl i f y (x^{2} + \frac{1}{4}) (x^{2} - \frac{3}{4})

e x p an d (t - 3) cos (t - 3)

e x p an d \frac{1}{1 + x ^{2}}

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