(x-3)(x+1)=3600

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Solution for (x-3)(x+1)=3600 equation:


Simplifying
(x + -3)(x + 1) = 3600

Reorder the terms:
(-3 + x)(x + 1) = 3600

Reorder the terms:
(-3 + x)(1 + x) = 3600

Multiply (-3 + x) * (1 + x)
(-3(1 + x) + x(1 + x)) = 3600
((1 * -3 + x * -3) + x(1 + x)) = 3600
((-3 + -3x) + x(1 + x)) = 3600
(-3 + -3x + (1 * x + x * x)) = 3600
(-3 + -3x + (1x + x2)) = 3600

Combine like terms: -3x + 1x = -2x
(-3 + -2x + x2) = 3600

Solving
-3 + -2x + x2 = 3600

Solving for variable 'x'.

Reorder the terms:
-3 + -3600 + -2x + x2 = 3600 + -3600

Combine like terms: -3 + -3600 = -3603
-3603 + -2x + x2 = 3600 + -3600

Combine like terms: 3600 + -3600 = 0
-3603 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3603' to each side of the equation.
-3603 + -2x + 3603 + x2 = 0 + 3603

Reorder the terms:
-3603 + 3603 + -2x + x2 = 0 + 3603

Combine like terms: -3603 + 3603 = 0
0 + -2x + x2 = 0 + 3603
-2x + x2 = 0 + 3603

Combine like terms: 0 + 3603 = 3603
-2x + x2 = 3603

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 3603 + 1

Reorder the terms:
1 + -2x + x2 = 3603 + 1

Combine like terms: 3603 + 1 = 3604
1 + -2x + x2 = 3604

Factor a perfect square on the left side:
(x + -1)(x + -1) = 3604

Calculate the square root of the right side: 60.033324079

Break this problem into two subproblems by setting 
(x + -1) equal to 60.033324079 and -60.033324079.

Subproblem 1

x + -1 = 60.033324079 Simplifying x + -1 = 60.033324079 Reorder the terms: -1 + x = 60.033324079 Solving -1 + x = 60.033324079 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 60.033324079 + 1 Combine like terms: -1 + 1 = 0 0 + x = 60.033324079 + 1 x = 60.033324079 + 1 Combine like terms: 60.033324079 + 1 = 61.033324079 x = 61.033324079 Simplifying x = 61.033324079

Subproblem 2

x + -1 = -60.033324079 Simplifying x + -1 = -60.033324079 Reorder the terms: -1 + x = -60.033324079 Solving -1 + x = -60.033324079 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -60.033324079 + 1 Combine like terms: -1 + 1 = 0 0 + x = -60.033324079 + 1 x = -60.033324079 + 1 Combine like terms: -60.033324079 + 1 = -59.033324079 x = -59.033324079 Simplifying x = -59.033324079

Solution

The solution to the problem is based on the solutions from the subproblems. x = {61.033324079, -59.033324079}

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