If the equation x^2+(7+a)x+7a+1=0 has equal roots,find the value of a.
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ANSWER = {9,5}

If the equation x^2+(7+a)x+7a+1=0 has equal roots,find the value of a.
.
.
.
ANSWER = {9,5}

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how should i start

For a root with multiplicity two you need to need to have the discriminant equal to 0.

D=b^2-4ac

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