化简 (1-\sqrt[3]{x})^2

解答

化简

(1 - 3 x)^{2}

1 - 2 3 x + (3 x)^{2}

求解步骤

(1 - 3 x)^{2}

使用完全平方公式:

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

(1 - 3 x)^{2} = 1^{2} - 2 \cdot 1 \cdot 3 x + (3 x)^{2}

= 1^{2} - 2 \cdot 1 \cdot 3 x + (3 x)^{2}

1^{2} = 1

- 2 \cdot 1 \cdot 3 x = - 2 3 x

= 1 - 2 3 x + (3 x)^{2}

e x p an d sec^{2} (x - y) (1 - \frac{d y}{d x})

s im pl i f y (1 + sin (x) + i cos (x))^{2}

e x p an d (1 + csc (x))^{2}

e x p an d \frac{2 x ^{3} + 3 x ^{2} - 15 x - 8}{( x + 2 ) ( x ^{3} - 3 x + 2 )}

\frac{d}{d v} ((p) (p + \frac{9.5}{v ^{2}}) (v - 4.4))