Please solve question no.9.

.....,

4x?-5x-3=0
Using quadratic formula:
X= -b +- root b? - 4ac /2a
a=4, b= -5, c= -3

x= -(-5) +- root (-5)? - 4(4)(-3)/2(4)

x= 5 +- root 25 +48/8

x= 5 +- 5 + 4root 3 /8

x= 5-5 +4root 3/8
x= 4root 3/8....ANS

OR

x= 5+5 +4root 3/8
x= 10 +4 root 3/8