Question

if one zero of the quadratic polynomial kx square + 3x + K is 2 then the value of k is

Answer 1

Product of zeroes = c/a = k/k = 1

Given one zero is 2

Let other zero be α

So, 2α = 1

α = 1/2

Now, sum of zeroes = -3/k

2 + α = -3/k

2 + 1/2 = -3/k

5/2 = -3/k

k = - 6/5