Question

The value of k for which kx2 + 28x + 49 is a perfect
square which is -​

Answer 1

Answer: I think the question is kx2+24x+49

( − 24 ) 2 − ( 4 × k × 16 ) = 0

576 − 64

k = 0 − 64

k = − 576

k = 9

Therefore,  

k = 9

Hopefully this helps!