7x(x+3)=5x+29

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Solution for 7x(x+3)=5x+29 equation:


Simplifying
7x(x + 3) = 5x + 29

Reorder the terms:
7x(3 + x) = 5x + 29
(3 * 7x + x * 7x) = 5x + 29
(21x + 7x2) = 5x + 29

Reorder the terms:
21x + 7x2 = 29 + 5x

Solving
21x + 7x2 = 29 + 5x

Solving for variable 'x'.

Reorder the terms:
-29 + 21x + -5x + 7x2 = 29 + 5x + -29 + -5x

Combine like terms: 21x + -5x = 16x
-29 + 16x + 7x2 = 29 + 5x + -29 + -5x

Reorder the terms:
-29 + 16x + 7x2 = 29 + -29 + 5x + -5x

Combine like terms: 29 + -29 = 0
-29 + 16x + 7x2 = 0 + 5x + -5x
-29 + 16x + 7x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-29 + 16x + 7x2 = 0

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

Divide each side by '7'.
-4.142857143 + 2.285714286x + x2 = 0

Move the constant term to the right:

Add '4.142857143' to each side of the equation.
-4.142857143 + 2.285714286x + 4.142857143 + x2 = 0 + 4.142857143

Reorder the terms:
-4.142857143 + 4.142857143 + 2.285714286x + x2 = 0 + 4.142857143

Combine like terms: -4.142857143 + 4.142857143 = 0.000000000
0.000000000 + 2.285714286x + x2 = 0 + 4.142857143
2.285714286x + x2 = 0 + 4.142857143

Combine like terms: 0 + 4.142857143 = 4.142857143
2.285714286x + x2 = 4.142857143

The x term is 2.285714286x.  Take half its coefficient (1.142857143).
Square it (1.306122449) and add it to both sides.

Add '1.306122449' to each side of the equation.
2.285714286x + 1.306122449 + x2 = 4.142857143 + 1.306122449

Reorder the terms:
1.306122449 + 2.285714286x + x2 = 4.142857143 + 1.306122449

Combine like terms: 4.142857143 + 1.306122449 = 5.448979592
1.306122449 + 2.285714286x + x2 = 5.448979592

Factor a perfect square on the left side:
(x + 1.142857143)(x + 1.142857143) = 5.448979592

Calculate the square root of the right side: 2.334304948

Break this problem into two subproblems by setting 
(x + 1.142857143) equal to 2.334304948 and -2.334304948.

Subproblem 1

x + 1.142857143 = 2.334304948 Simplifying x + 1.142857143 = 2.334304948 Reorder the terms: 1.142857143 + x = 2.334304948 Solving 1.142857143 + x = 2.334304948 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.142857143' to each side of the equation. 1.142857143 + -1.142857143 + x = 2.334304948 + -1.142857143 Combine like terms: 1.142857143 + -1.142857143 = 0.000000000 0.000000000 + x = 2.334304948 + -1.142857143 x = 2.334304948 + -1.142857143 Combine like terms: 2.334304948 + -1.142857143 = 1.191447805 x = 1.191447805 Simplifying x = 1.191447805

Subproblem 2

x + 1.142857143 = -2.334304948 Simplifying x + 1.142857143 = -2.334304948 Reorder the terms: 1.142857143 + x = -2.334304948 Solving 1.142857143 + x = -2.334304948 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.142857143' to each side of the equation. 1.142857143 + -1.142857143 + x = -2.334304948 + -1.142857143 Combine like terms: 1.142857143 + -1.142857143 = 0.000000000 0.000000000 + x = -2.334304948 + -1.142857143 x = -2.334304948 + -1.142857143 Combine like terms: -2.334304948 + -1.142857143 = -3.477162091 x = -3.477162091 Simplifying x = -3.477162091

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.191447805, -3.477162091}

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