2x(x+7)+x=6x+10

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Solution for 2x(x+7)+x=6x+10 equation:


Simplifying
2x(x + 7) + x = 6x + 10

Reorder the terms:
2x(7 + x) + x = 6x + 10
(7 * 2x + x * 2x) + x = 6x + 10
(14x + 2x2) + x = 6x + 10

Reorder the terms:
14x + x + 2x2 = 6x + 10

Combine like terms: 14x + x = 15x
15x + 2x2 = 6x + 10

Reorder the terms:
15x + 2x2 = 10 + 6x

Solving
15x + 2x2 = 10 + 6x

Solving for variable 'x'.

Reorder the terms:
-10 + 15x + -6x + 2x2 = 10 + 6x + -10 + -6x

Combine like terms: 15x + -6x = 9x
-10 + 9x + 2x2 = 10 + 6x + -10 + -6x

Reorder the terms:
-10 + 9x + 2x2 = 10 + -10 + 6x + -6x

Combine like terms: 10 + -10 = 0
-10 + 9x + 2x2 = 0 + 6x + -6x
-10 + 9x + 2x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-10 + 9x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-5 + 4.5x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 4.5x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + 4.5x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 4.5x + x2 = 0 + 5
4.5x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
4.5x + x2 = 5

The x term is 4.5x.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5x + 5.0625 + x2 = 5 + 5.0625

Reorder the terms:
5.0625 + 4.5x + x2 = 5 + 5.0625

Combine like terms: 5 + 5.0625 = 10.0625
5.0625 + 4.5x + x2 = 10.0625

Factor a perfect square on the left side:
(x + 2.25)(x + 2.25) = 10.0625

Calculate the square root of the right side: 3.172144385

Break this problem into two subproblems by setting 
(x + 2.25) equal to 3.172144385 and -3.172144385.

Subproblem 1

x + 2.25 = 3.172144385 Simplifying x + 2.25 = 3.172144385 Reorder the terms: 2.25 + x = 3.172144385 Solving 2.25 + x = 3.172144385 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = 3.172144385 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = 3.172144385 + -2.25 x = 3.172144385 + -2.25 Combine like terms: 3.172144385 + -2.25 = 0.922144385 x = 0.922144385 Simplifying x = 0.922144385

Subproblem 2

x + 2.25 = -3.172144385 Simplifying x + 2.25 = -3.172144385 Reorder the terms: 2.25 + x = -3.172144385 Solving 2.25 + x = -3.172144385 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + x = -3.172144385 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + x = -3.172144385 + -2.25 x = -3.172144385 + -2.25 Combine like terms: -3.172144385 + -2.25 = -5.422144385 x = -5.422144385 Simplifying x = -5.422144385

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.922144385, -5.422144385}

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