Question

If (-2 )is a factor of x²-5x+m then the value of m ​

Answer 1

Answer:

if (x-2) is a factor of f(x) then f(2) = 0, so,

2 × 2³ - 5 × 2² + 5 × 2 - m = 0

2 × 8 - 5 × 4 + 10 - m = 0

16 - 20 + 10 - m = 0

6 - m = 0

m = 6