Question

if -5 is a root of quadratic equation kx²+2x-140=0. find the number of k​

Answer 1

Step-by-step explanation:

-5 is root of quadratic equation

P(x) =Kx^2x-140=0

p(-5) = k(-5)^2+2(-5)-140

0 = 25k-10-140

0 = 25k-150

150= 25k

k = 150/25

k = 30/5

k = 6

Hence, value of k is 6