Answers

2015-10-27T19:05:50+05:30
Let f(x) = ax²+bx+c
f(2) = 4a+2b+c = -3
f(-2) = 4a - 2b +c = 21

f(2) – f(-2) = 4b = -24
b = -6
The coefficient of x = –6

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