An algebra problem by Bold Drew
Algebra
Level
3
Let f (x) be a quadratic polynomial with f (2 ) =10 and f (-2) = -2.Then the coefficient of x in f (x) is ?
2
1
3
4
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1 solution
Quadratic function f(x)=ax^2+bx+c f(2)=4a+2b+c=10----(A) f(-2)=4a-2b+c=-2-----(B) Solving (A)and(B) we get 4b = 12 Hence b=3