Question

find the roots of the following equation: 4x^2 - 5x - 9 = 0​

Answer 1

Step-by-step explanation:

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

= 8*5− 73 and x

2 = 8/5+ 73 ans

Answer 2

Step-by-step explanation:

4x^2-9x+4x-9=0

4x(x+1)-9(x+1)=0

x+1=0 ,4x-9=0

x=-1 ,4x=9

x=9/4

x=(9/4)root

x=3/2

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