(n+1)(n+-2)=3

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Solution for (n+1)(n+-2)=3 equation:


Simplifying
(n + 1)(n + -2) = 3

Reorder the terms:
(1 + n)(n + -2) = 3

Reorder the terms:
(1 + n)(-2 + n) = 3

Multiply (1 + n) * (-2 + n)
(1(-2 + n) + n(-2 + n)) = 3
((-2 * 1 + n * 1) + n(-2 + n)) = 3
((-2 + 1n) + n(-2 + n)) = 3
(-2 + 1n + (-2 * n + n * n)) = 3
(-2 + 1n + (-2n + n2)) = 3

Combine like terms: 1n + -2n = -1n
(-2 + -1n + n2) = 3

Solving
-2 + -1n + n2 = 3

Solving for variable 'n'.

Reorder the terms:
-2 + -3 + -1n + n2 = 3 + -3

Combine like terms: -2 + -3 = -5
-5 + -1n + n2 = 3 + -3

Combine like terms: 3 + -3 = 0
-5 + -1n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -1n + 5 + n2 = 0 + 5

Reorder the terms:
-5 + 5 + -1n + n2 = 0 + 5

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

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

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.
-1n + 0.25 + n2 = 5 + 0.25

Reorder the terms:
0.25 + -1n + n2 = 5 + 0.25

Combine like terms: 5 + 0.25 = 5.25
0.25 + -1n + n2 = 5.25

Factor a perfect square on the left side:
(n + -0.5)(n + -0.5) = 5.25

Calculate the square root of the right side: 2.291287847

Break this problem into two subproblems by setting 
(n + -0.5) equal to 2.291287847 and -2.291287847.

Subproblem 1

n + -0.5 = 2.291287847 Simplifying n + -0.5 = 2.291287847 Reorder the terms: -0.5 + n = 2.291287847 Solving -0.5 + n = 2.291287847 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 = 2.291287847 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = 2.291287847 + 0.5 n = 2.291287847 + 0.5 Combine like terms: 2.291287847 + 0.5 = 2.791287847 n = 2.791287847 Simplifying n = 2.791287847

Subproblem 2

n + -0.5 = -2.291287847 Simplifying n + -0.5 = -2.291287847 Reorder the terms: -0.5 + n = -2.291287847 Solving -0.5 + n = -2.291287847 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 = -2.291287847 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = -2.291287847 + 0.5 n = -2.291287847 + 0.5 Combine like terms: -2.291287847 + 0.5 = -1.791287847 n = -1.791287847 Simplifying n = -1.791287847

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.791287847, -1.791287847}

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