7x^2+52x+2=0

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Solution for 7x^2+52x+2=0 equation:


Simplifying
7x2 + 52x + 2 = 0

Reorder the terms:
2 + 52x + 7x2 = 0

Solving
2 + 52x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
0.2857142857 + 7.428571429x + x2 = 0

Move the constant term to the right:

Add '-0.2857142857' to each side of the equation.
0.2857142857 + 7.428571429x + -0.2857142857 + x2 = 0 + -0.2857142857

Reorder the terms:
0.2857142857 + -0.2857142857 + 7.428571429x + x2 = 0 + -0.2857142857

Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000
0.0000000000 + 7.428571429x + x2 = 0 + -0.2857142857
7.428571429x + x2 = 0 + -0.2857142857

Combine like terms: 0 + -0.2857142857 = -0.2857142857
7.428571429x + x2 = -0.2857142857

The x term is 7.428571429x.  Take half its coefficient (3.714285715).
Square it (13.79591837) and add it to both sides.

Add '13.79591837' to each side of the equation.
7.428571429x + 13.79591837 + x2 = -0.2857142857 + 13.79591837

Reorder the terms:
13.79591837 + 7.428571429x + x2 = -0.2857142857 + 13.79591837

Combine like terms: -0.2857142857 + 13.79591837 = 13.5102040843
13.79591837 + 7.428571429x + x2 = 13.5102040843

Factor a perfect square on the left side:
(x + 3.714285715)(x + 3.714285715) = 13.5102040843

Calculate the square root of the right side: 3.675622952

Break this problem into two subproblems by setting 
(x + 3.714285715) equal to 3.675622952 and -3.675622952.

Subproblem 1

x + 3.714285715 = 3.675622952 Simplifying x + 3.714285715 = 3.675622952 Reorder the terms: 3.714285715 + x = 3.675622952 Solving 3.714285715 + x = 3.675622952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.714285715' to each side of the equation. 3.714285715 + -3.714285715 + x = 3.675622952 + -3.714285715 Combine like terms: 3.714285715 + -3.714285715 = 0.000000000 0.000000000 + x = 3.675622952 + -3.714285715 x = 3.675622952 + -3.714285715 Combine like terms: 3.675622952 + -3.714285715 = -0.038662763 x = -0.038662763 Simplifying x = -0.038662763

Subproblem 2

x + 3.714285715 = -3.675622952 Simplifying x + 3.714285715 = -3.675622952 Reorder the terms: 3.714285715 + x = -3.675622952 Solving 3.714285715 + x = -3.675622952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.714285715' to each side of the equation. 3.714285715 + -3.714285715 + x = -3.675622952 + -3.714285715 Combine like terms: 3.714285715 + -3.714285715 = 0.000000000 0.000000000 + x = -3.675622952 + -3.714285715 x = -3.675622952 + -3.714285715 Combine like terms: -3.675622952 + -3.714285715 = -7.389908667 x = -7.389908667 Simplifying x = -7.389908667

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.038662763, -7.389908667}

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