Question 262987
what value of k will make 16x^2/9 (fraction) - kx + 36 a perfect square trinomial?

16x^2/9 –kx+36

16x^2 -9kx + 36=0

-9k= 2*4*6
-9k= 48
K= 48/9

16x^2 –9* (48/9) +36=0
16x^2+48x+36=0
(4x+6)^2