(x+11)*(x-3)=3

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Solution for (x+11)*(x-3)=3 equation:


Simplifying
(x + 11)(x + -3) = 3

Reorder the terms:
(11 + x)(x + -3) = 3

Reorder the terms:
(11 + x)(-3 + x) = 3

Multiply (11 + x) * (-3 + x)
(11(-3 + x) + x(-3 + x)) = 3
((-3 * 11 + x * 11) + x(-3 + x)) = 3
((-33 + 11x) + x(-3 + x)) = 3
(-33 + 11x + (-3 * x + x * x)) = 3
(-33 + 11x + (-3x + x2)) = 3

Combine like terms: 11x + -3x = 8x
(-33 + 8x + x2) = 3

Solving
-33 + 8x + x2 = 3

Solving for variable 'x'.

Reorder the terms:
-33 + -3 + 8x + x2 = 3 + -3

Combine like terms: -33 + -3 = -36
-36 + 8x + x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-36 + 8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 8x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + 8x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 8x + x2 = 0 + 36
8x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
8x + x2 = 36

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 36 + 16

Reorder the terms:
16 + 8x + x2 = 36 + 16

Combine like terms: 36 + 16 = 52
16 + 8x + x2 = 52

Factor a perfect square on the left side:
(x + 4)(x + 4) = 52

Calculate the square root of the right side: 7.211102551

Break this problem into two subproblems by setting 
(x + 4) equal to 7.211102551 and -7.211102551.

Subproblem 1

x + 4 = 7.211102551 Simplifying x + 4 = 7.211102551 Reorder the terms: 4 + x = 7.211102551 Solving 4 + x = 7.211102551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 7.211102551 + -4 Combine like terms: 4 + -4 = 0 0 + x = 7.211102551 + -4 x = 7.211102551 + -4 Combine like terms: 7.211102551 + -4 = 3.211102551 x = 3.211102551 Simplifying x = 3.211102551

Subproblem 2

x + 4 = -7.211102551 Simplifying x + 4 = -7.211102551 Reorder the terms: 4 + x = -7.211102551 Solving 4 + x = -7.211102551 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -7.211102551 + -4 Combine like terms: 4 + -4 = 0 0 + x = -7.211102551 + -4 x = -7.211102551 + -4 Combine like terms: -7.211102551 + -4 = -11.211102551 x = -11.211102551 Simplifying x = -11.211102551

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.211102551, -11.211102551}

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