Question

Choose correct alternative.

Eaquation x^2 - 14x +49 = 0 has

1) One solution
2) Two roots
3) A double root
4) One distinct real root
5) One root with multiplicity 2
6) Repeated roots
7) All of the above
8) None of the above.

Answer 1

one solution

Answer 2

x=7

Answer 3

x^2-7x-7x+49
x(x-7)-7(x-7)
(x-7)(x-7) = 0

Because it has one solution, it cannot have two roots or repeated roots, it simply has one solution.

Answer 4

repeated roots

Answer 5

Reason I am asking this is because seems to be a confusion about this and looking around I can't seem to find a definitive answer.

I quite like 5 or else 7.

Someone know of a definitive source?

Answer 6

Anyone? (Bump)