展开 (a+b)(c+d^')

解答

展开

(a + b) (c + d^{^{'}})

a c + a d^{'} + b c + b d^{'}

求解步骤

(a + b) (c + d^{^{'}})

使用 FOIL 方法:

(a + b) (c + d) = a c + a d + b c + b d

a = a, b = b, c = c, d = d^{^{'}}

= a c + a d^{^{^{'}}} + b c + b d^{^{^{'}}}

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

e x p an d a l e f t (t^{2} + i^{2})^{2}

e x p an d lo g_{10} (6) (12 - 4 x) 2

\frac{\partial}{\partial y} ((z) (t x^{2} + yz - 2))

\frac{d}{d t} ((x) (4 t + 3))