展开 (3-x^2)*e^x

解答

展开

(3 - x^{2}) \cdot e^{x}

3 e^{x} - e^{x} x^{2}

求解步骤

(3 - x^{2}) e^{x}

= e^{x} (3 - x^{2})

使用分配律:

a (b - c) = ab - a c

a = e^{x}, b = 3, c = x^{2}

= e^{x} \cdot 3 - e^{x} x^{2}

= 3 e^{x} - e^{x} x^{2}

e x p an d \frac{( 1 - j ) ^{9}}{( 1 + j ) ^{7}}

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

e x p an d \frac{( 1 + 6 x )}{( ( 4 x - 3 ) ( 2 x + 5 ) )}

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

e x p an d \frac{8 e ^{- 2 t} ( 1 + 23 t )}{5}