Question

Kisme kitan hai dum​

Answer 1

I hope this will help you

Answer 2

Answer:

We given –5 is a root of the quadratic equation

2x²+px–15=0 ,

-5 satisfies the given equation.

2(-5)² + p(-5) - 15 = 0

50 - 5p - 15 = 0

35 - 5p = 0

5p = 35

p = 35/5

p = 7

Substituting p= 7 in (x²+x) + k = 0

we get, 7(x²+x)+ k = 0

7x² + 7x + k = 0

The roots of the equation are equal.

# Discriminant = b² - 4ac = 0

here, a = 7, b = 7, c = k

b² - 4ac = 0

(7)² - 4(7)(k) = 0

49 - 28k = 0

28k = 49

k = 49/28

k = 7/4

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