10n^2+6n+7=4

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Solution for 10n^2+6n+7=4 equation:


Simplifying
10n2 + 6n + 7 = 4

Reorder the terms:
7 + 6n + 10n2 = 4

Solving
7 + 6n + 10n2 = 4

Solving for variable 'n'.

Reorder the terms:
7 + -4 + 6n + 10n2 = 4 + -4

Combine like terms: 7 + -4 = 3
3 + 6n + 10n2 = 4 + -4

Combine like terms: 4 + -4 = 0
3 + 6n + 10n2 = 0

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

Divide each side by '10'.
0.3 + 0.6n + n2 = 0

Move the constant term to the right:

Add '-0.3' to each side of the equation.
0.3 + 0.6n + -0.3 + n2 = 0 + -0.3

Reorder the terms:
0.3 + -0.3 + 0.6n + n2 = 0 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + 0.6n + n2 = 0 + -0.3
0.6n + n2 = 0 + -0.3

Combine like terms: 0 + -0.3 = -0.3
0.6n + n2 = -0.3

The n term is 0.6n.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6n + 0.09 + n2 = -0.3 + 0.09

Reorder the terms:
0.09 + 0.6n + n2 = -0.3 + 0.09

Combine like terms: -0.3 + 0.09 = -0.21
0.09 + 0.6n + n2 = -0.21

Factor a perfect square on the left side:
(n + 0.3)(n + 0.3) = -0.21

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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