270=3.7n^2+8n-3

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Solution for 270=3.7n^2+8n-3 equation:


Simplifying
270 = 3.7n2 + 8n + -3

Reorder the terms:
270 = -3 + 8n + 3.7n2

Solving
270 = -3 + 8n + 3.7n2

Solving for variable 'n'.

Combine like terms: 270 + 3 = 273
273 + -8n + -3.7n2 = -3 + 8n + 3.7n2 + 3 + -8n + -3.7n2

Reorder the terms:
273 + -8n + -3.7n2 = -3 + 3 + 8n + -8n + 3.7n2 + -3.7n2

Combine like terms: -3 + 3 = 0
273 + -8n + -3.7n2 = 0 + 8n + -8n + 3.7n2 + -3.7n2
273 + -8n + -3.7n2 = 8n + -8n + 3.7n2 + -3.7n2

Combine like terms: 8n + -8n = 0
273 + -8n + -3.7n2 = 0 + 3.7n2 + -3.7n2
273 + -8n + -3.7n2 = 3.7n2 + -3.7n2

Combine like terms: 3.7n2 + -3.7n2 = 0.0
273 + -8n + -3.7n2 = 0.0

Begin completing the square.  Divide all terms by
-3.7 the coefficient of the squared term: 

Divide each side by '-3.7'.
-73.78378378 + 2.162162162n + n2 = 0

Move the constant term to the right:

Add '73.78378378' to each side of the equation.
-73.78378378 + 2.162162162n + 73.78378378 + n2 = 0 + 73.78378378

Reorder the terms:
-73.78378378 + 73.78378378 + 2.162162162n + n2 = 0 + 73.78378378

Combine like terms: -73.78378378 + 73.78378378 = 0.00000000
0.00000000 + 2.162162162n + n2 = 0 + 73.78378378
2.162162162n + n2 = 0 + 73.78378378

Combine like terms: 0 + 73.78378378 = 73.78378378
2.162162162n + n2 = 73.78378378

The n term is 2.162162162n.  Take half its coefficient (1.081081081).
Square it (1.168736304) and add it to both sides.

Add '1.168736304' to each side of the equation.
2.162162162n + 1.168736304 + n2 = 73.78378378 + 1.168736304

Reorder the terms:
1.168736304 + 2.162162162n + n2 = 73.78378378 + 1.168736304

Combine like terms: 73.78378378 + 1.168736304 = 74.952520084
1.168736304 + 2.162162162n + n2 = 74.952520084

Factor a perfect square on the left side:
(n + 1.081081081)(n + 1.081081081) = 74.952520084

Calculate the square root of the right side: 8.65751235

Break this problem into two subproblems by setting 
(n + 1.081081081) equal to 8.65751235 and -8.65751235.

Subproblem 1

n + 1.081081081 = 8.65751235 Simplifying n + 1.081081081 = 8.65751235 Reorder the terms: 1.081081081 + n = 8.65751235 Solving 1.081081081 + n = 8.65751235 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.081081081' to each side of the equation. 1.081081081 + -1.081081081 + n = 8.65751235 + -1.081081081 Combine like terms: 1.081081081 + -1.081081081 = 0.000000000 0.000000000 + n = 8.65751235 + -1.081081081 n = 8.65751235 + -1.081081081 Combine like terms: 8.65751235 + -1.081081081 = 7.576431269 n = 7.576431269 Simplifying n = 7.576431269

Subproblem 2

n + 1.081081081 = -8.65751235 Simplifying n + 1.081081081 = -8.65751235 Reorder the terms: 1.081081081 + n = -8.65751235 Solving 1.081081081 + n = -8.65751235 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.081081081' to each side of the equation. 1.081081081 + -1.081081081 + n = -8.65751235 + -1.081081081 Combine like terms: 1.081081081 + -1.081081081 = 0.000000000 0.000000000 + n = -8.65751235 + -1.081081081 n = -8.65751235 + -1.081081081 Combine like terms: -8.65751235 + -1.081081081 = -9.738593431 n = -9.738593431 Simplifying n = -9.738593431

Solution

The solution to the problem is based on the solutions from the subproblems. n = {7.576431269, -9.738593431}

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