Question

find the coefficient of x^2 and x in the product of (x-3)(x+7)(x-4)​

Answer 1

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Answer 2

consider (x-3)(x+7)

we get x^2 +4x -21

then again (x^2+4x-21)(x-4)

we get x^3-4x^2 +4x^2 -16x -21x+84

x^3-37x +84

coefficient of x^2 is 0

coefficient of x is -37