Question

Determine a if x - 2 is a factor of f(x) = 4x^4 - 7x^3 + 3x^2 - ax + 18. ​

Answer 1

a = 19

Explanation:

IF x-2 is a factor, then x = 2 will make the equation = 0

4 (2^4) - 7(2^3) + 3(2^2) -2a + 18 = 0

64 - 56 + 12 - 2a + 18 = 0

38 - 2a = 0

a = 19