Question

the value of k when the roots of equation x2-kx+25=0 are equal​

Answer 1

Answer:

Sorry, this will never happen as a quadratic equation always has two roots. However, these roots may have the same value, which is what you really want.

Consider the generic quadratic equation: ax2+bx+c=0

Do you recall the formula for finding the roots of this equation?

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x=−b±b2−4ac√2a

For the roots to be identical, the radical part must be zero, thus we require:

b2=4ac

From your equation, b=k , a=1 and c=25 , thus:

k2=4×25=100⇒k=±10

Answer: k = ±10

Should apply… D=0=>

k^2–4*25=0=>

k=+/- 2*5=+/-10

Answer 2

Answer:

k =√200 or k= 10√2

Step-by-step explanation:

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