25n^2+4n-1=1-5n

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Solution for 25n^2+4n-1=1-5n equation:


Simplifying
25n2 + 4n + -1 = 1 + -5n

Reorder the terms:
-1 + 4n + 25n2 = 1 + -5n

Solving
-1 + 4n + 25n2 = 1 + -5n

Solving for variable 'n'.

Reorder the terms:
-1 + -1 + 4n + 5n + 25n2 = 1 + -5n + -1 + 5n

Combine like terms: -1 + -1 = -2
-2 + 4n + 5n + 25n2 = 1 + -5n + -1 + 5n

Combine like terms: 4n + 5n = 9n
-2 + 9n + 25n2 = 1 + -5n + -1 + 5n

Reorder the terms:
-2 + 9n + 25n2 = 1 + -1 + -5n + 5n

Combine like terms: 1 + -1 = 0
-2 + 9n + 25n2 = 0 + -5n + 5n
-2 + 9n + 25n2 = -5n + 5n

Combine like terms: -5n + 5n = 0
-2 + 9n + 25n2 = 0

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

Divide each side by '25'.
-0.08 + 0.36n + n2 = 0

Move the constant term to the right:

Add '0.08' to each side of the equation.
-0.08 + 0.36n + 0.08 + n2 = 0 + 0.08

Reorder the terms:
-0.08 + 0.08 + 0.36n + n2 = 0 + 0.08

Combine like terms: -0.08 + 0.08 = 0.00
0.00 + 0.36n + n2 = 0 + 0.08
0.36n + n2 = 0 + 0.08

Combine like terms: 0 + 0.08 = 0.08
0.36n + n2 = 0.08

The n term is 0.36n.  Take half its coefficient (0.18).
Square it (0.0324) and add it to both sides.

Add '0.0324' to each side of the equation.
0.36n + 0.0324 + n2 = 0.08 + 0.0324

Reorder the terms:
0.0324 + 0.36n + n2 = 0.08 + 0.0324

Combine like terms: 0.08 + 0.0324 = 0.1124
0.0324 + 0.36n + n2 = 0.1124

Factor a perfect square on the left side:
(n + 0.18)(n + 0.18) = 0.1124

Calculate the square root of the right side: 0.335261092

Break this problem into two subproblems by setting 
(n + 0.18) equal to 0.335261092 and -0.335261092.

Subproblem 1

n + 0.18 = 0.335261092 Simplifying n + 0.18 = 0.335261092 Reorder the terms: 0.18 + n = 0.335261092 Solving 0.18 + n = 0.335261092 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.18' to each side of the equation. 0.18 + -0.18 + n = 0.335261092 + -0.18 Combine like terms: 0.18 + -0.18 = 0.00 0.00 + n = 0.335261092 + -0.18 n = 0.335261092 + -0.18 Combine like terms: 0.335261092 + -0.18 = 0.155261092 n = 0.155261092 Simplifying n = 0.155261092

Subproblem 2

n + 0.18 = -0.335261092 Simplifying n + 0.18 = -0.335261092 Reorder the terms: 0.18 + n = -0.335261092 Solving 0.18 + n = -0.335261092 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.18' to each side of the equation. 0.18 + -0.18 + n = -0.335261092 + -0.18 Combine like terms: 0.18 + -0.18 = 0.00 0.00 + n = -0.335261092 + -0.18 n = -0.335261092 + -0.18 Combine like terms: -0.335261092 + -0.18 = -0.515261092 n = -0.515261092 Simplifying n = -0.515261092

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.155261092, -0.515261092}

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