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```        question:find coeff of x^3 in
(x-4)*(x-1)*(x+2)*(x+8)*(x+6).sir i want to know shortcut method at earliest```
8 years ago

Pratham Ashish
17 Points
```										hi,
see the coefficient of x^3 wii be the
sum of all the terms of form  x * x * X * a * b
we have only to select  a & b  , for this we have to select two  terms from (x-4)*(x-1)*(x+2)*(x+8)*(x+6).
these can be
( -4 *-1 )   or (-4 *2 ) or ( 2 * 8 ).................
gives ,    4  -8  -32  -24 -2 -8 -6 +16 +12 +48
= 0
so the coeff. of x^3 is 0

```
8 years ago
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