Question

if one of the zeros of the quadratic polynomial (k - 3)×2 + 12 x + 3 is -3 find k

Answer 1

Given One of the zeroes of the polynomial is -3

so when X=-3 the Polynomial Become 0

→(k-3)×2 + 12(-3) +3=0
→2k-6 -36 +3=0
→2k -39=0
→2k=39
→k=39/2