(n-3)(n-4)=49

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Solution for (n-3)(n-4)=49 equation:


Simplifying
(n + -3)(n + -4) = 49

Reorder the terms:
(-3 + n)(n + -4) = 49

Reorder the terms:
(-3 + n)(-4 + n) = 49

Multiply (-3 + n) * (-4 + n)
(-3(-4 + n) + n(-4 + n)) = 49
((-4 * -3 + n * -3) + n(-4 + n)) = 49
((12 + -3n) + n(-4 + n)) = 49
(12 + -3n + (-4 * n + n * n)) = 49
(12 + -3n + (-4n + n2)) = 49

Combine like terms: -3n + -4n = -7n
(12 + -7n + n2) = 49

Solving
12 + -7n + n2 = 49

Solving for variable 'n'.

Reorder the terms:
12 + -49 + -7n + n2 = 49 + -49

Combine like terms: 12 + -49 = -37
-37 + -7n + n2 = 49 + -49

Combine like terms: 49 + -49 = 0
-37 + -7n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '37' to each side of the equation.
-37 + -7n + 37 + n2 = 0 + 37

Reorder the terms:
-37 + 37 + -7n + n2 = 0 + 37

Combine like terms: -37 + 37 = 0
0 + -7n + n2 = 0 + 37
-7n + n2 = 0 + 37

Combine like terms: 0 + 37 = 37
-7n + n2 = 37

The n term is -7n.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7n + 12.25 + n2 = 37 + 12.25

Reorder the terms:
12.25 + -7n + n2 = 37 + 12.25

Combine like terms: 37 + 12.25 = 49.25
12.25 + -7n + n2 = 49.25

Factor a perfect square on the left side:
(n + -3.5)(n + -3.5) = 49.25

Calculate the square root of the right side: 7.017834424

Break this problem into two subproblems by setting 
(n + -3.5) equal to 7.017834424 and -7.017834424.

Subproblem 1

n + -3.5 = 7.017834424 Simplifying n + -3.5 = 7.017834424 Reorder the terms: -3.5 + n = 7.017834424 Solving -3.5 + n = 7.017834424 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + n = 7.017834424 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + n = 7.017834424 + 3.5 n = 7.017834424 + 3.5 Combine like terms: 7.017834424 + 3.5 = 10.517834424 n = 10.517834424 Simplifying n = 10.517834424

Subproblem 2

n + -3.5 = -7.017834424 Simplifying n + -3.5 = -7.017834424 Reorder the terms: -3.5 + n = -7.017834424 Solving -3.5 + n = -7.017834424 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + n = -7.017834424 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + n = -7.017834424 + 3.5 n = -7.017834424 + 3.5 Combine like terms: -7.017834424 + 3.5 = -3.517834424 n = -3.517834424 Simplifying n = -3.517834424

Solution

The solution to the problem is based on the solutions from the subproblems. n = {10.517834424, -3.517834424}

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