Question

if x=-7/2 is a zero of polynomial 2x^2 + kx -12, find value of k​

Answer 1

Step-by-step explanation:

put x = -7/2 in given equation

2(-7/2)²+k (-7/2) - 12 = 0

98/4 - 7k/2- 12= 0

98-14k- 48 / 4 = 0

50 - 14k = 0

-14k = -50

k = -50/-14

k = 25/7