Let p(X) be a quadratic polynomial p(3)=9&p(-3)=-10.then the coefficient of X in p(X)?
User , 7 Years ago
Grade 10
Most Scoring Topics in IIT JEE> Let p(X) be a quadratic polynomial p(3)=9...
1 AnswersArun
Last Activity: 7 Years ago
Dear student
Let f(x) = ax2 + bx + c
Given, f(3) = 9
This gives 9a + 3b + c = 9 ... (1)
Given, f(-3) = -10
This gives 9a - 3b + c = -10 ... (2)
Subtracting (2) from (1), we get,
6b = 19
b = 19/6
Thus, the coefficient of x in f(x) is b = 19/6.
Regards
Arun (askIITians forum expert)
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