7x(x+2)=29

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Solution for 7x(x+2)=29 equation:


Simplifying
7x(x + 2) = 29

Reorder the terms:
7x(2 + x) = 29
(2 * 7x + x * 7x) = 29
(14x + 7x2) = 29

Solving
14x + 7x2 = 29

Solving for variable 'x'.

Reorder the terms:
-29 + 14x + 7x2 = 29 + -29

Combine like terms: 29 + -29 = 0
-29 + 14x + 7x2 = 0

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

Divide each side by '7'.
-4.142857143 + 2x + x2 = 0

Move the constant term to the right:

Add '4.142857143' to each side of the equation.
-4.142857143 + 2x + 4.142857143 + x2 = 0 + 4.142857143

Reorder the terms:
-4.142857143 + 4.142857143 + 2x + x2 = 0 + 4.142857143

Combine like terms: -4.142857143 + 4.142857143 = 0.000000000
0.000000000 + 2x + x2 = 0 + 4.142857143
2x + x2 = 0 + 4.142857143

Combine like terms: 0 + 4.142857143 = 4.142857143
2x + x2 = 4.142857143

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 4.142857143 + 1

Reorder the terms:
1 + 2x + x2 = 4.142857143 + 1

Combine like terms: 4.142857143 + 1 = 5.142857143
1 + 2x + x2 = 5.142857143

Factor a perfect square on the left side:
(x + 1)(x + 1) = 5.142857143

Calculate the square root of the right side: 2.267786838

Break this problem into two subproblems by setting 
(x + 1) equal to 2.267786838 and -2.267786838.

Subproblem 1

x + 1 = 2.267786838 Simplifying x + 1 = 2.267786838 Reorder the terms: 1 + x = 2.267786838 Solving 1 + x = 2.267786838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.267786838 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.267786838 + -1 x = 2.267786838 + -1 Combine like terms: 2.267786838 + -1 = 1.267786838 x = 1.267786838 Simplifying x = 1.267786838

Subproblem 2

x + 1 = -2.267786838 Simplifying x + 1 = -2.267786838 Reorder the terms: 1 + x = -2.267786838 Solving 1 + x = -2.267786838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.267786838 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.267786838 + -1 x = -2.267786838 + -1 Combine like terms: -2.267786838 + -1 = -3.267786838 x = -3.267786838 Simplifying x = -3.267786838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.267786838, -3.267786838}

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