SOLUTION: If {{{ 2x^2+6x+c=0 }}} has exactly one solution, what is the value of c?

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Question 970339: If +2x%5E2%2B6x%2Bc=0+ has exactly one solution, what is the value of c?
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
2x^2 + 6x + C = 0
divide both sides of = by 2
x^2 + 3x + C/2 = 0
(x + 1.5) * (x + 1.5) = 0
therefore
2.25 = C/2 and
C = 4.50