EXPANSIONS

Asked by  | 12th Jul, 2009, 05:28: AM

Expert Answer:

 (x-3) (x+7) (x-4)

[x2 +7x -3x -21] (x-4)

[x2 +4x  -21] (x-4)

x3 +4x2 -21x -4x2 -16x +84

x3  -37x   +84

4x2 & -4x2 get cancelled therefore 0 is the coefficient of x2 term

Answered by  | 12th Jul, 2009, 10:21: AM

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