Question

If 9xsquare + kx+1=0 has equal roots then find the value of K?

Answer 1

Answer:

±6

Explanation:

9x²+kx+1=0

a=9,b=k,c=1

b²-4ac by using discriminant formula

k²-4(9)(1)

=k²-36

=k²=36

=k= under root of 36

k=±6

I hope this helps you