Answers>Maths>A Level>Article

f ( x ) = 2 x ^3 − 5 x ^2 + ax + a. Given that (x + 2) is a factor of f ( x ), find the value of the constant a. (3 marker)

If x+2 is definitely a factor, that means when we sub x=-2 in, we should get 0 at the end. So 2(-2)^3 - 5(-2)^2 + a(-2) + a = 0So -16 -20= aso a = -36

Answered by • Maths tutor

10710 Views

See similar Maths A Level tutors

f ( x ) = 2 x ^3 − 5 x ^2 + ax + a. Given that (x + 2) is a factor of f ( x ), find the value of the constant a. (3 marker)

Related Maths A Level answers

Integrate the following function: f(x) = 8x^3 + 1/x + 5

Compute the integral of f(x)=x^3/x^4+1

How do I differentiate y=(4+9x)^5 with respect to x?

Integrate 1/x