Question

find the value of k if 3x square + kx -3 has equal roots​

Answer 1

Step-by-step explanation:

Given:-

3x square + kx -3 has equal roots

To find:-

find the value of k

To find:-

Given quadratic polynomialis 3x²+Kx-3

On comparing with the standard quadratic pilynomial ax²+bx+c

a=3

b=k

c=-3

If it has equal roots then the value of its discriminant must be equal to zero

=>b²-4ac=0

=>k²-4(3)(-3)=0

=>k²+36=0

=>k²=-36

=>k=√-36

=>k=√(i²×36)

i²=-1

=>k=±6i

Answer:-

The value of k is 6i or -6i