展开 (sqrt(4-x^2))^2

解答

展开

(4 - x^{2})^{2}

- x^{2} + 4

求解步骤

(4 - x^{2})^{2}

使用根式运算法则:

a = a^{\frac{1}{2}}

= ((4 - x^{2})^{\frac{1}{2}})^{2}

使用指数法则:

(a^{b})^{c} = a^{b c}

= (4 - x^{2})^{\frac{1}{2} \cdot 2}

\frac{1}{2} \cdot 2 = 1

= 4 - x^{2}

改写为标准形式

= - x^{2} + 4

e x p an d (15 x^{2} - 14 x) d x - d y

e x p an d \frac{x + 1}{( x - 8 ) ( x + 5 )}

e x p an d \frac{Vi wl}{R ( 1 - w ^{2} l c ) + i wl}

e x p an d \frac{1}{( 1 - b ) ( 1 - a )}

e x p an d \frac{3 e ^{- 2 x}}{x ( 10 x + 1 )}