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RadEn
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can you check the discriminant ?

RadEn
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discriminant (D) = b^2  4ac

aliera95
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it is 0

zzr0ck3r
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(b+sqrt(b^24ac))/2a is how we find roots
you just showed that the sqrt part is 0
so you are left with
b/(2a)

zzr0ck3r
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this is only one solution

RadEn
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if D = 0 then it has the same roots

zzr0ck3r
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note: if you did not get 0, then the sqrt part would have two answers because we do +sqrt.

aliera95
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so my answer is d) ?