7x^2+12x=29

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Solution for 7x^2+12x=29 equation:


Simplifying
7x2 + 12x = 29

Reorder the terms:
12x + 7x2 = 29

Solving
12x + 7x2 = 29

Solving for variable 'x'.

Reorder the terms:
-29 + 12x + 7x2 = 29 + -29

Combine like terms: 29 + -29 = 0
-29 + 12x + 7x2 = 0

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

Divide each side by '7'.
-4.142857143 + 1.714285714x + x2 = 0

Move the constant term to the right:

Add '4.142857143' to each side of the equation.
-4.142857143 + 1.714285714x + 4.142857143 + x2 = 0 + 4.142857143

Reorder the terms:
-4.142857143 + 4.142857143 + 1.714285714x + x2 = 0 + 4.142857143

Combine like terms: -4.142857143 + 4.142857143 = 0.000000000
0.000000000 + 1.714285714x + x2 = 0 + 4.142857143
1.714285714x + x2 = 0 + 4.142857143

Combine like terms: 0 + 4.142857143 = 4.142857143
1.714285714x + x2 = 4.142857143

The x term is 1.714285714x.  Take half its coefficient (0.857142857).
Square it (0.7346938773) and add it to both sides.

Add '0.7346938773' to each side of the equation.
1.714285714x + 0.7346938773 + x2 = 4.142857143 + 0.7346938773

Reorder the terms:
0.7346938773 + 1.714285714x + x2 = 4.142857143 + 0.7346938773

Combine like terms: 4.142857143 + 0.7346938773 = 4.8775510203
0.7346938773 + 1.714285714x + x2 = 4.8775510203

Factor a perfect square on the left side:
(x + 0.857142857)(x + 0.857142857) = 4.8775510203

Calculate the square root of the right side: 2.208517833

Break this problem into two subproblems by setting 
(x + 0.857142857) equal to 2.208517833 and -2.208517833.

Subproblem 1

x + 0.857142857 = 2.208517833 Simplifying x + 0.857142857 = 2.208517833 Reorder the terms: 0.857142857 + x = 2.208517833 Solving 0.857142857 + x = 2.208517833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.857142857' to each side of the equation. 0.857142857 + -0.857142857 + x = 2.208517833 + -0.857142857 Combine like terms: 0.857142857 + -0.857142857 = 0.000000000 0.000000000 + x = 2.208517833 + -0.857142857 x = 2.208517833 + -0.857142857 Combine like terms: 2.208517833 + -0.857142857 = 1.351374976 x = 1.351374976 Simplifying x = 1.351374976

Subproblem 2

x + 0.857142857 = -2.208517833 Simplifying x + 0.857142857 = -2.208517833 Reorder the terms: 0.857142857 + x = -2.208517833 Solving 0.857142857 + x = -2.208517833 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.857142857' to each side of the equation. 0.857142857 + -0.857142857 + x = -2.208517833 + -0.857142857 Combine like terms: 0.857142857 + -0.857142857 = 0.000000000 0.000000000 + x = -2.208517833 + -0.857142857 x = -2.208517833 + -0.857142857 Combine like terms: -2.208517833 + -0.857142857 = -3.06566069 x = -3.06566069 Simplifying x = -3.06566069

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.351374976, -3.06566069}

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