(x+4)(x-3)=-1

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Solution for (x+4)(x-3)=-1 equation:


Simplifying
(x + 4)(x + -3) = -1

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

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

Multiply (4 + x) * (-3 + x)
(4(-3 + x) + x(-3 + x)) = -1
((-3 * 4 + x * 4) + x(-3 + x)) = -1
((-12 + 4x) + x(-3 + x)) = -1
(-12 + 4x + (-3 * x + x * x)) = -1
(-12 + 4x + (-3x + x2)) = -1

Combine like terms: 4x + -3x = 1x
(-12 + 1x + x2) = -1

Solving
-12 + 1x + x2 = -1

Solving for variable 'x'.

Reorder the terms:
-12 + 1 + 1x + x2 = -1 + 1

Combine like terms: -12 + 1 = -11
-11 + 1x + x2 = -1 + 1

Combine like terms: -1 + 1 = 0
-11 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 1x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + 1x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 1x + x2 = 0 + 11
1x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
1x + x2 = 11

The x term is 1x.  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.
x + 0.25 + x2 = 11 + 0.25

Reorder the terms:
0.25 + x + x2 = 11 + 0.25

Combine like terms: 11 + 0.25 = 11.25
0.25 + x + x2 = 11.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 11.25

Calculate the square root of the right side: 3.354101966

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3.354101966 and -3.354101966.

Subproblem 1

x + 0.5 = 3.354101966 Simplifying x + 0.5 = 3.354101966 Reorder the terms: 0.5 + x = 3.354101966 Solving 0.5 + x = 3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3.354101966 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.354101966 + -0.5 x = 3.354101966 + -0.5 Combine like terms: 3.354101966 + -0.5 = 2.854101966 x = 2.854101966 Simplifying x = 2.854101966

Subproblem 2

x + 0.5 = -3.354101966 Simplifying x + 0.5 = -3.354101966 Reorder the terms: 0.5 + x = -3.354101966 Solving 0.5 + x = -3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3.354101966 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.354101966 + -0.5 x = -3.354101966 + -0.5 Combine like terms: -3.354101966 + -0.5 = -3.854101966 x = -3.854101966 Simplifying x = -3.854101966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.854101966, -3.854101966}

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