9x^2+52x-7=0

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Solution for 9x^2+52x-7=0 equation:


Simplifying
9x2 + 52x + -7 = 0

Reorder the terms:
-7 + 52x + 9x2 = 0

Solving
-7 + 52x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-0.7777777778 + 5.777777778x + x2 = 0

Move the constant term to the right:

Add '0.7777777778' to each side of the equation.
-0.7777777778 + 5.777777778x + 0.7777777778 + x2 = 0 + 0.7777777778

Reorder the terms:
-0.7777777778 + 0.7777777778 + 5.777777778x + x2 = 0 + 0.7777777778

Combine like terms: -0.7777777778 + 0.7777777778 = 0.0000000000
0.0000000000 + 5.777777778x + x2 = 0 + 0.7777777778
5.777777778x + x2 = 0 + 0.7777777778

Combine like terms: 0 + 0.7777777778 = 0.7777777778
5.777777778x + x2 = 0.7777777778

The x term is 5.777777778x.  Take half its coefficient (2.888888889).
Square it (8.345679013) and add it to both sides.

Add '8.345679013' to each side of the equation.
5.777777778x + 8.345679013 + x2 = 0.7777777778 + 8.345679013

Reorder the terms:
8.345679013 + 5.777777778x + x2 = 0.7777777778 + 8.345679013

Combine like terms: 0.7777777778 + 8.345679013 = 9.1234567908
8.345679013 + 5.777777778x + x2 = 9.1234567908

Factor a perfect square on the left side:
(x + 2.888888889)(x + 2.888888889) = 9.1234567908

Calculate the square root of the right side: 3.020506049

Break this problem into two subproblems by setting 
(x + 2.888888889) equal to 3.020506049 and -3.020506049.

Subproblem 1

x + 2.888888889 = 3.020506049 Simplifying x + 2.888888889 = 3.020506049 Reorder the terms: 2.888888889 + x = 3.020506049 Solving 2.888888889 + x = 3.020506049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.888888889' to each side of the equation. 2.888888889 + -2.888888889 + x = 3.020506049 + -2.888888889 Combine like terms: 2.888888889 + -2.888888889 = 0.000000000 0.000000000 + x = 3.020506049 + -2.888888889 x = 3.020506049 + -2.888888889 Combine like terms: 3.020506049 + -2.888888889 = 0.13161716 x = 0.13161716 Simplifying x = 0.13161716

Subproblem 2

x + 2.888888889 = -3.020506049 Simplifying x + 2.888888889 = -3.020506049 Reorder the terms: 2.888888889 + x = -3.020506049 Solving 2.888888889 + x = -3.020506049 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.888888889' to each side of the equation. 2.888888889 + -2.888888889 + x = -3.020506049 + -2.888888889 Combine like terms: 2.888888889 + -2.888888889 = 0.000000000 0.000000000 + x = -3.020506049 + -2.888888889 x = -3.020506049 + -2.888888889 Combine like terms: -3.020506049 + -2.888888889 = -5.909394938 x = -5.909394938 Simplifying x = -5.909394938

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.13161716, -5.909394938}

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