if f(x) is a quadratic polynomial. if f(2)= -3 and f(-2)= 21. then find the coefficient of x.
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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
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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