Question

Find the value of k,fow which one root of the quadratic equation kx^2-14x+8=0 is 2.

Answer 1

Answer:

k = 5

Step-by-step explanation:

One of the roots is 2 so therefore we can plug it in the equation

kx^2 -14x + 8 = 0  

By substituting we get: k(2)^2 - 14(2) + 8 = 0

                                  => 4k - 28 + 8 = 0

                                  => 4k = 28 - 8

                                  => 4k = 20

                                  => k = 20/4 = 5