Question

If -4 is a root of the quadratic equation x2+px-4 and the quadratic equation x2+px+q=0 has equal root, find the value of k. plzz answer

Answer 1

Step-by-step explanation:

ANSWER

Since −4 is a root of the equation x

2

+px−4=0

∴(−4)

2

+p×(−4)−4=0⇒16−4p−4=0⇒4p=12⇒p=3

The equation x

2

+px+k=0 has equal roots

∴ Discriminant =0

⇒p

2

−4k=0⇒k=

4

9

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Thank you.

Answer 2

* The difference of and interger a and (- 6) is 4 find the value of a