Question

If roots of quadratic equation (m - 12)
x2 + 2(m - 12)x + 2 = 0 are real and equal,
then value of m =
(1) 12 (2) 14 (3) -12 (4) 12 and 14
3
​

Answer 1

Answer:

In any quadratic equation, real roots exist if discriminant is greater than or equal to zero.

So for x

2

+bx+4=0

Discriminant is =b

2

−4×1×4

So, b

2

−16≥0

⇒b≥4,b≤−4

Step-by-step explanation:

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Answer 2

Answer:

d-. 12and 14

Step-by-step explanation:

explanation is attached in image