(1x-3)(x+7)=11x+11

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Solution for (1x-3)(x+7)=11x+11 equation:


Simplifying
(1x + -3)(x + 7) = 11x + 11

Reorder the terms:
(-3 + 1x)(x + 7) = 11x + 11

Reorder the terms:
(-3 + 1x)(7 + x) = 11x + 11

Multiply (-3 + 1x) * (7 + x)
(-3(7 + x) + 1x * (7 + x)) = 11x + 11
((7 * -3 + x * -3) + 1x * (7 + x)) = 11x + 11
((-21 + -3x) + 1x * (7 + x)) = 11x + 11
(-21 + -3x + (7 * 1x + x * 1x)) = 11x + 11
(-21 + -3x + (7x + 1x2)) = 11x + 11

Combine like terms: -3x + 7x = 4x
(-21 + 4x + 1x2) = 11x + 11

Reorder the terms:
-21 + 4x + 1x2 = 11 + 11x

Solving
-21 + 4x + 1x2 = 11 + 11x

Solving for variable 'x'.

Reorder the terms:
-21 + -11 + 4x + -11x + 1x2 = 11 + 11x + -11 + -11x

Combine like terms: -21 + -11 = -32
-32 + 4x + -11x + 1x2 = 11 + 11x + -11 + -11x

Combine like terms: 4x + -11x = -7x
-32 + -7x + 1x2 = 11 + 11x + -11 + -11x

Reorder the terms:
-32 + -7x + 1x2 = 11 + -11 + 11x + -11x

Combine like terms: 11 + -11 = 0
-32 + -7x + 1x2 = 0 + 11x + -11x
-32 + -7x + 1x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
-32 + -7x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + -7x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + -7x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -7x + x2 = 0 + 32
-7x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
-7x + x2 = 32

The x term is -7x.  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.
-7x + 12.25 + x2 = 32 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 32 + 12.25

Combine like terms: 32 + 12.25 = 44.25
12.25 + -7x + x2 = 44.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(x + -3.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

x + -3.5 = 6.652067348 Simplifying x + -3.5 = 6.652067348 Reorder the terms: -3.5 + x = 6.652067348 Solving -3.5 + x = 6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 6.652067348 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 6.652067348 + 3.5 x = 6.652067348 + 3.5 Combine like terms: 6.652067348 + 3.5 = 10.152067348 x = 10.152067348 Simplifying x = 10.152067348

Subproblem 2

x + -3.5 = -6.652067348 Simplifying x + -3.5 = -6.652067348 Reorder the terms: -3.5 + x = -6.652067348 Solving -3.5 + x = -6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -6.652067348 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -6.652067348 + 3.5 x = -6.652067348 + 3.5 Combine like terms: -6.652067348 + 3.5 = -3.152067348 x = -3.152067348 Simplifying x = -3.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.152067348, -3.152067348}

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