Question

If Ä+B+C =0 then ÄxB is
(2) BX
(1) ČB
(4) Zero
(3) Äx​

Answer 1

Answer:

Given quadratic equation is ax

2

+bx+c=0

Also given b=a+c

We know that, when a given equation have equal roots, then its discriminant is always equal to be zero.

Therefore, D=0

⇒b

2

−4ac=0

⇒b

2

=4ac

⇒(a+c)

2

=4ac

⇒a

2

+2ac+c

2

=4ac

⇒a

2

−2ac+c

2

=0

⇒(a−c)

2

=0

⇒a−c=0

⇒a=c

Hence, option A is correct.

Explanation:

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