Question

9. Solve the following equations by using quadratic formula and give your answer correct
to 2 decimal places :
(i) 4x2 - 5x - 3 = 0
(2017) ​

Answer 1

Answer:

We have given,

4x

2

−5x−3=0

We know that,

x=

2a

−b±

b

2

−4ac

Where,

b=−5

a=4

c=−3

∴x=

2(4)

5±

(5)

2

−4(4)(−3)

x=

8

5±

73

∴x

1

=

8

5−

73

and x

2

=

8

5+

73