Question

If x-2 is a factor of x³-3x+5a then the value of a is
​

Answer 1

x-2 =0

x=2

• x^3-3x+5a = 0

(2)^2 - 3(2) + 5a = 0

8 - 6 + 5a = 0

2 + 5a = 0

5a = -2

a = -2

5