(x-3)(x+17)=1

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Solution for (x-3)(x+17)=1 equation:


Simplifying
(x + -3)(x + 17) = 1

Reorder the terms:
(-3 + x)(x + 17) = 1

Reorder the terms:
(-3 + x)(17 + x) = 1

Multiply (-3 + x) * (17 + x)
(-3(17 + x) + x(17 + x)) = 1
((17 * -3 + x * -3) + x(17 + x)) = 1
((-51 + -3x) + x(17 + x)) = 1
(-51 + -3x + (17 * x + x * x)) = 1
(-51 + -3x + (17x + x2)) = 1

Combine like terms: -3x + 17x = 14x
(-51 + 14x + x2) = 1

Solving
-51 + 14x + x2 = 1

Solving for variable 'x'.

Reorder the terms:
-51 + -1 + 14x + x2 = 1 + -1

Combine like terms: -51 + -1 = -52
-52 + 14x + x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-52 + 14x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '52' to each side of the equation.
-52 + 14x + 52 + x2 = 0 + 52

Reorder the terms:
-52 + 52 + 14x + x2 = 0 + 52

Combine like terms: -52 + 52 = 0
0 + 14x + x2 = 0 + 52
14x + x2 = 0 + 52

Combine like terms: 0 + 52 = 52
14x + x2 = 52

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = 52 + 49

Reorder the terms:
49 + 14x + x2 = 52 + 49

Combine like terms: 52 + 49 = 101
49 + 14x + x2 = 101

Factor a perfect square on the left side:
(x + 7)(x + 7) = 101

Calculate the square root of the right side: 10.049875621

Break this problem into two subproblems by setting 
(x + 7) equal to 10.049875621 and -10.049875621.

Subproblem 1

x + 7 = 10.049875621 Simplifying x + 7 = 10.049875621 Reorder the terms: 7 + x = 10.049875621 Solving 7 + x = 10.049875621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 10.049875621 + -7 Combine like terms: 7 + -7 = 0 0 + x = 10.049875621 + -7 x = 10.049875621 + -7 Combine like terms: 10.049875621 + -7 = 3.049875621 x = 3.049875621 Simplifying x = 3.049875621

Subproblem 2

x + 7 = -10.049875621 Simplifying x + 7 = -10.049875621 Reorder the terms: 7 + x = -10.049875621 Solving 7 + x = -10.049875621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -10.049875621 + -7 Combine like terms: 7 + -7 = 0 0 + x = -10.049875621 + -7 x = -10.049875621 + -7 Combine like terms: -10.049875621 + -7 = -17.049875621 x = -17.049875621 Simplifying x = -17.049875621

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.049875621, -17.049875621}

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