n*n+1*n+2=57

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Solution for n*n+1*n+2=57 equation:


Simplifying
n * n + 1n + 2 = 57

Multiply n * n
n2 + 1n + 2 = 57

Reorder the terms:
2 + 1n + n2 = 57

Solving
2 + 1n + n2 = 57

Solving for variable 'n'.

Reorder the terms:
2 + -57 + 1n + n2 = 57 + -57

Combine like terms: 2 + -57 = -55
-55 + 1n + n2 = 57 + -57

Combine like terms: 57 + -57 = 0
-55 + 1n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + 1n + 55 + n2 = 0 + 55

Reorder the terms:
-55 + 55 + 1n + n2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + 1n + n2 = 0 + 55
1n + n2 = 0 + 55

Combine like terms: 0 + 55 = 55
1n + n2 = 55

The n term is 1n.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
n + 0.25 + n2 = 55 + 0.25

Reorder the terms:
0.25 + n + n2 = 55 + 0.25

Combine like terms: 55 + 0.25 = 55.25
0.25 + n + n2 = 55.25

Factor a perfect square on the left side:
(n + 0.5)(n + 0.5) = 55.25

Calculate the square root of the right side: 7.433034374

Break this problem into two subproblems by setting 
(n + 0.5) equal to 7.433034374 and -7.433034374.

Subproblem 1

n + 0.5 = 7.433034374 Simplifying n + 0.5 = 7.433034374 Reorder the terms: 0.5 + n = 7.433034374 Solving 0.5 + n = 7.433034374 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + n = 7.433034374 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = 7.433034374 + -0.5 n = 7.433034374 + -0.5 Combine like terms: 7.433034374 + -0.5 = 6.933034374 n = 6.933034374 Simplifying n = 6.933034374

Subproblem 2

n + 0.5 = -7.433034374 Simplifying n + 0.5 = -7.433034374 Reorder the terms: 0.5 + n = -7.433034374 Solving 0.5 + n = -7.433034374 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + n = -7.433034374 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = -7.433034374 + -0.5 n = -7.433034374 + -0.5 Combine like terms: -7.433034374 + -0.5 = -7.933034374 n = -7.933034374 Simplifying n = -7.933034374

Solution

The solution to the problem is based on the solutions from the subproblems. n = {6.933034374, -7.933034374}

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