Question

find the value of k for quadratic equation kx²+(2k+4)x+9=0 so that they have two equal roots

Answer 1

Step-by-step explanation:

for two equal roots

D=0 i.e

b2-4ac=0

a=k , b=2k+4 , c=9

(2k+4)2 + 4*k*9=0

4k2+16+36k=0

4ksquare+36k+16=0

by middle term spiliting u can find the answer