SOLUTION: Solve using the quadratic formula. 9n squared + 4 +7n

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Question 957430: Solve using the quadratic formula.
9n squared + 4 +7n
Found 2 solutions by Alan3354, MathLover1:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Equations are solved.
This is not an equation.
I can tell - there's no equal sign.

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

if you need to solve 9n%5E2+%2B+4+%2B7n first make it equal to zero
9n%5E2+%2B+4+%2B7n=0....rearrange terms
9n%5E2%2B7n+%2B+4+=0 ....compare to general form ax%5E2%2Bbx+%2Bc+=0, you see that a=9, b=7, and c=4
now plug it in quadratic formula
n+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
n+=+%28-7+%2B-+sqrt%287%5E2-4%2A9%2A4+%29%29%2F%282%2A9%29+
n+=+%28-7+%2B-+sqrt%2849-144+%29%29%2F18+
n+=+%28-7+%2B-+sqrt%28-95+%29%29%2F18+

n+=+%28-7+%2B-+sqrt%2895+%29%2Ai%29%2F18+
exact solutions:

n+=+%28-7+%2B+sqrt%2895+%29%2Ai%29%2F18+
n+=+%28-7+-+sqrt%2895+%29%2Ai%29%2F18+
approximate solutions:
n+=+-7%2F18+%2B+9.75%2Ai%2F18+ =>n+=+-0.39+%2B+0.54%2Ai+
n+=+-7%2F18+-+sqrt%2895+%29%2Ai%2F18+=>n+=+-0.39+-+0.54%2Ai+