9x^2-13x=-3

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Solution for 9x^2-13x=-3 equation:


Simplifying
9x2 + -13x = -3

Reorder the terms:
-13x + 9x2 = -3

Solving
-13x + 9x2 = -3

Solving for variable 'x'.

Reorder the terms:
3 + -13x + 9x2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + -13x + 9x2 = 0

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

Divide each side by '9'.
0.3333333333 + -1.444444444x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + -1.444444444x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + -1.444444444x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + -1.444444444x + x2 = 0 + -0.3333333333
-1.444444444x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
-1.444444444x + x2 = -0.3333333333

The x term is -1.444444444x.  Take half its coefficient (-0.722222222).
Square it (0.5216049380) and add it to both sides.

Add '0.5216049380' to each side of the equation.
-1.444444444x + 0.5216049380 + x2 = -0.3333333333 + 0.5216049380

Reorder the terms:
0.5216049380 + -1.444444444x + x2 = -0.3333333333 + 0.5216049380

Combine like terms: -0.3333333333 + 0.5216049380 = 0.1882716047
0.5216049380 + -1.444444444x + x2 = 0.1882716047

Factor a perfect square on the left side:
(x + -0.722222222)(x + -0.722222222) = 0.1882716047

Calculate the square root of the right side: 0.433902759

Break this problem into two subproblems by setting 
(x + -0.722222222) equal to 0.433902759 and -0.433902759.

Subproblem 1

x + -0.722222222 = 0.433902759 Simplifying x + -0.722222222 = 0.433902759 Reorder the terms: -0.722222222 + x = 0.433902759 Solving -0.722222222 + x = 0.433902759 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.722222222' to each side of the equation. -0.722222222 + 0.722222222 + x = 0.433902759 + 0.722222222 Combine like terms: -0.722222222 + 0.722222222 = 0.000000000 0.000000000 + x = 0.433902759 + 0.722222222 x = 0.433902759 + 0.722222222 Combine like terms: 0.433902759 + 0.722222222 = 1.156124981 x = 1.156124981 Simplifying x = 1.156124981

Subproblem 2

x + -0.722222222 = -0.433902759 Simplifying x + -0.722222222 = -0.433902759 Reorder the terms: -0.722222222 + x = -0.433902759 Solving -0.722222222 + x = -0.433902759 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.722222222' to each side of the equation. -0.722222222 + 0.722222222 + x = -0.433902759 + 0.722222222 Combine like terms: -0.722222222 + 0.722222222 = 0.000000000 0.000000000 + x = -0.433902759 + 0.722222222 x = -0.433902759 + 0.722222222 Combine like terms: -0.433902759 + 0.722222222 = 0.288319463 x = 0.288319463 Simplifying x = 0.288319463

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.156124981, 0.288319463}

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