Question

If x=3 is a root of the polynomial f(x) =2xsquare -3x+7a,find the value of a​

Answer 1

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Answer 2

Answer:

a= -9/7

Step-by-step explanation:

x = 3

f(x) = 2xsquare - 3x + 7a

therefore, f(3) = 2(3)square - 3(3) + 7a

f(3) = 2(9) - 9 + 7a

f(3) = 18 - 9 + 7a

f(3) = 9 + 7a

therefore equating to 0,

9 + 7a = 0

7a = -9

therefore, a= -9/7

Hope it helps... think its correct im not sure