5+2n(3-10n)=

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Solution for 5+2n(3-10n)= equation:


Simplifying
5 + 2n(3 + -10n) = 0
5 + (3 * 2n + -10n * 2n) = 0
5 + (6n + -20n2) = 0

Solving
5 + 6n + -20n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
-20 the coefficient of the squared term: 

Divide each side by '-20'.
-0.25 + -0.3n + n2 = 0.0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -0.3n + 0.25 + n2 = 0.0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -0.3n + n2 = 0.0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -0.3n + n2 = 0.0 + 0.25
-0.3n + n2 = 0.0 + 0.25

Combine like terms: 0.0 + 0.25 = 0.25
-0.3n + n2 = 0.25

The n term is -0.3n.  Take half its coefficient (-0.15).
Square it (0.0225) and add it to both sides.

Add '0.0225' to each side of the equation.
-0.3n + 0.0225 + n2 = 0.25 + 0.0225

Reorder the terms:
0.0225 + -0.3n + n2 = 0.25 + 0.0225

Combine like terms: 0.25 + 0.0225 = 0.2725
0.0225 + -0.3n + n2 = 0.2725

Factor a perfect square on the left side:
(n + -0.15)(n + -0.15) = 0.2725

Calculate the square root of the right side: 0.522015325

Break this problem into two subproblems by setting 
(n + -0.15) equal to 0.522015325 and -0.522015325.

Subproblem 1

n + -0.15 = 0.522015325 Simplifying n + -0.15 = 0.522015325 Reorder the terms: -0.15 + n = 0.522015325 Solving -0.15 + n = 0.522015325 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + n = 0.522015325 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + n = 0.522015325 + 0.15 n = 0.522015325 + 0.15 Combine like terms: 0.522015325 + 0.15 = 0.672015325 n = 0.672015325 Simplifying n = 0.672015325

Subproblem 2

n + -0.15 = -0.522015325 Simplifying n + -0.15 = -0.522015325 Reorder the terms: -0.15 + n = -0.522015325 Solving -0.15 + n = -0.522015325 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.15' to each side of the equation. -0.15 + 0.15 + n = -0.522015325 + 0.15 Combine like terms: -0.15 + 0.15 = 0.00 0.00 + n = -0.522015325 + 0.15 n = -0.522015325 + 0.15 Combine like terms: -0.522015325 + 0.15 = -0.372015325 n = -0.372015325 Simplifying n = -0.372015325

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.672015325, -0.372015325}

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