SOLUTION: How many real roots/solutions does 9x^2+12x=−4

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Question 1113539: How many real roots/solutions does
9x^2+12x=−4
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many real roots/solutions does
9x^2+12x= -4
9x^2+12x + 4 = 0
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Find the discriminant
Disc = b^2 - 4ac
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Disc < 0 --> no real roots
Disc = 0 --> 2 real roots that are equal, eg 2 & 2
Disc > 0 --> 2 real roots that are not equal, eg 2 & 3
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A quadratic always has 2 roots. Sometimes the 2 are equal, called "multiplicity 2."
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A cubic always has 3.
A quartic always has 4.
Etc.

Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
9x%5E2%2B12x%2B4=0


How many rea; roots?
You can try discriminant if you want, or...


9x%5E2%2B12x%2B4=%283x%2B2%29%283x%2B2%29=%283x%2B2%29%5E2

Only one real root.