展开 x(1+csqrt(1-x^2))

解答

展开

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

x + c x 1 - x^{2}

求解步骤

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

使用分配律:

a (b + c) = ab + a c

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

= x \cdot 1 + x c 1 - x^{2}

化简

x \cdot 1 + x c 1 - x^{2} : x + c x 1 - x^{2}

= x + c x 1 - x^{2}

e x p an d (1 + 3 = 6, 5) - (6 + 3 = 165)

e x p an d (1 + e^{3 t})^{2}

e x p an d \frac{c}{2 ( y - c )}

s im pl i f y x (e^{i y} + e^{i 2 π y})

e x p an d \frac{1}{( s + a ) ( s + b ) ^{2}}