Question

find the roots of the quadratic equation X square + 5 x minus (a + 1) a + 6 is equal to zero
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Answer 1

Answer:

formula for roots of quadratic

expression ax

2

+bx+c=0 is

=

2a

−b±

b

2

−4ac

So for x

2

+5x−(a

2

+a−6)=

⇒

2

−5±

25+4(a

2

+a−6)

⇒

2

−5±

4a

2

+4a+1

⇒

2

−5

±

(a+1/2)

2

=

2

−5

±(a+1/2)