Question 687864
if f(x) is aquadratic polynomial such that f(2)=-3 and f(-2)=21, then the coefficient of x in f(x) is
A)4
B)7
C)-6
D)-3
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Form: ax^2 + bx + c = y
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Using (-2,21)::: 4a -2b + c = 21
Using (2,-3):::: 4a +2b + c = -3
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Subtract and solve for "b":
4b = -24
b = -6
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Cheers,
Stan H.
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