展开 dx(25x^2+9)

解答

展开

d x (25 x^{2} + 9)

25 x^{2} d x + 9 d x

求解步骤

d x (25 x^{2} + 9)

使用分配律:

a (b + c) = ab + a c

a = d x, b = 25 x^{2}, c = 9

= d x \cdot 25 x^{2} + d x \cdot 9

= 25 x^{2} d x + 9 d x

e x p an d \frac{k ( s + z )}{s ( s + 1 )}

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

e x p an d 9 (x = 3)^{7} + 5 (x + 3) 4 + 2 (x + 3)

e x p an d 2 (e^{5} - e^{2})

e x p an d 18 π (\frac{π}{12} - \frac{1}{4})