化简 (sqrt(x)-sqrt(a))^2

解答

化简

(x - a)^{2}

x - 2 x a + a

求解步骤

(x - a)^{2}

使用完全平方公式:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(x - a)^{2} = (x)^{2} - 2 x a + (a)^{2}

= (x)^{2} - 2 x a + (a)^{2}

(x)^{2} = x

(a)^{2} = a

= x - 2 x a + a

e x p an d (y + 5 y^{3}) (\frac{- 2}{y ^{3}} + \frac{3}{y ^{5}})

e x p an d (- 3, - 4) y (- 2, - 8)

e x p an d lo g_{2} (8.5)

s im pl i f y (y 2 - 7) (y 2 + 7)

e x p an d d - e (4 d + 8)