7n^2+5n=-7

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Solution for 7n^2+5n=-7 equation:


Simplifying
7n2 + 5n = -7

Reorder the terms:
5n + 7n2 = -7

Solving
5n + 7n2 = -7

Solving for variable 'n'.

Reorder the terms:
7 + 5n + 7n2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 5n + 7n2 = 0

Begin completing the square.  Divide all terms by
7 the coefficient of the squared term: 

Divide each side by '7'.
1 + 0.7142857143n + n2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 0.7142857143n + -1 + n2 = 0 + -1

Reorder the terms:
1 + -1 + 0.7142857143n + n2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 0.7142857143n + n2 = 0 + -1
0.7142857143n + n2 = 0 + -1

Combine like terms: 0 + -1 = -1
0.7142857143n + n2 = -1

The n term is 0.7142857143n.  Take half its coefficient (0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
0.7142857143n + 0.1275510204 + n2 = -1 + 0.1275510204

Reorder the terms:
0.1275510204 + 0.7142857143n + n2 = -1 + 0.1275510204

Combine like terms: -1 + 0.1275510204 = -0.8724489796
0.1275510204 + 0.7142857143n + n2 = -0.8724489796

Factor a perfect square on the left side:
(n + 0.3571428572)(n + 0.3571428572) = -0.8724489796

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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