展开 (a+b)(c+d)(e+f)(g+h)

解答

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(a + b) (c + d) (e + f) (g + h)

e a c g + e a c h + a c f g + a c f h + e a d g + e a d h + a df g + a df h + e b c g + e b c h + b c f g + b c f h + e b d g + e b d h + b df g + b df h

求解步骤

(a + b) (c + d) (e + f) (g + h)

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(a + b) (c + d) : a c + a d + b c + b d

= (a c + a d + b c + b d) (e + f) (g + h)

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(a c + a d + b c + b d) (e + f) : e a c + a c f + e a d + a df + e b c + b c f + e b d + b df

= (e a c + a c f + e a d + a df + e b c + b c f + e b d + b df) (g + h)

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(e a c + a c f + e a d + a df + e b c + b c f + e b d + b df) (g + h) : e a c g + e a c h + a c f g + a c f h + e a d g + e a d h + a df g + a df h + e b c g + e b c h + b c f g + b c f h + e b d g + e b d h + b df g + b df h

= e a c g + e a c h + a c f g + a c f h + e a d g + e a d h + a df g + a df h + e b c g + e b c h + b c f g + b c f h + e b d g + e b d h + b df g + b df h

e x p an d k (p = 4 k + 4 u (p))

e x p an d (4 x - 1) e^{4 x}

e x p an d e^{x} \cdot (x^{2} - 6 x + 9)

e x p an d 8 (n + 2 = 24)

e x p an d 4 - 6 (2 X + 1 = 10)