Question

17. 2x² + ax-a?=0 find the roots by using quadratic formula

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Answer 1

Step-by-step explanation:

Answer

2x

2

+ax−a

2

=0

Here, a=2,b=a and c=−a

2

Using the formula

x=

2a

−b

b

2

−4ac

⇒x=

2×2

−a±

a

2

−4×2×−a

2

=

4

−a±

9a

2

=

4

−a±3a

⇒x=

4

−a+3a

=

2

a

.x=

4

−a+3a

=−a⇒x=

2

a

,−a