Question

solve by quadratic formula 2x2+x-4=0

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Answer 1

Answer:

The given quadratic equation is

2x

2

+x−4=0

⇒x

2

+

2

x

−2=0

⇒x

2

+

2

x

=2

On adding both sides

16

1

we get

x

2

+

2

x

+

16

1

=2+

16

1

⇒(x+

4

1

)

2

=

16

33

⇒x+

4

1

=±

4

33

⇒x=±

4

33

−

4

1

⇒x=

4

−1−

33

,

4

−1+

33

Answer 2

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