Question

If -4 is a root of the quadratic equation x^2+px-4=0 and x^2+px+k=0 has equal roots find the value of k
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Answer 1

Answer:

subtract equation 1 and 2

x^2+px-4-(x^2+px+k)=0

x^2+px-4-x^2-px-k=0

-4-k=0

k=-4

hope it helps