Question

Find k, if one of the roots of x²–kx+6=0 is 3.

Answer 1

Hey

Here is your answer,

x^2 - kx + 6 = 0
(3)^2 - 3k + 6 = 0
9 - 3k + 6 = 0
-3k = -15
K = 5

Hope it helps you!

Answer 2

x² - kx + 6 = 0

(3)² - k × 3 + 6 = 0

9 - 3k + 6 = 0


-3k + 15 = 0


k = 5