-5n^2-3n+4=

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Solution for -5n^2-3n+4= equation:


Simplifying
-5n2 + -3n + 4 = 0

Reorder the terms:
4 + -3n + -5n2 = 0

Solving
4 + -3n + -5n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-0.8 + 0.6n + n2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + 0.6n + 0.8 + n2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + 0.6n + n2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + 0.6n + n2 = 0 + 0.8
0.6n + n2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
0.6n + n2 = 0.8

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 = 0.8 + 0.09

Reorder the terms:
0.09 + 0.6n + n2 = 0.8 + 0.09

Combine like terms: 0.8 + 0.09 = 0.89
0.09 + 0.6n + n2 = 0.89

Factor a perfect square on the left side:
(n + 0.3)(n + 0.3) = 0.89

Calculate the square root of the right side: 0.943398113

Break this problem into two subproblems by setting 
(n + 0.3) equal to 0.943398113 and -0.943398113.

Subproblem 1

n + 0.3 = 0.943398113 Simplifying n + 0.3 = 0.943398113 Reorder the terms: 0.3 + n = 0.943398113 Solving 0.3 + n = 0.943398113 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + n = 0.943398113 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + n = 0.943398113 + -0.3 n = 0.943398113 + -0.3 Combine like terms: 0.943398113 + -0.3 = 0.643398113 n = 0.643398113 Simplifying n = 0.643398113

Subproblem 2

n + 0.3 = -0.943398113 Simplifying n + 0.3 = -0.943398113 Reorder the terms: 0.3 + n = -0.943398113 Solving 0.3 + n = -0.943398113 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + n = -0.943398113 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + n = -0.943398113 + -0.3 n = -0.943398113 + -0.3 Combine like terms: -0.943398113 + -0.3 = -1.243398113 n = -1.243398113 Simplifying n = -1.243398113

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.643398113, -1.243398113}

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