9x^2-7x-11=24

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Solution for 9x^2-7x-11=24 equation:


Simplifying
9x2 + -7x + -11 = 24

Reorder the terms:
-11 + -7x + 9x2 = 24

Solving
-11 + -7x + 9x2 = 24

Solving for variable 'x'.

Reorder the terms:
-11 + -24 + -7x + 9x2 = 24 + -24

Combine like terms: -11 + -24 = -35
-35 + -7x + 9x2 = 24 + -24

Combine like terms: 24 + -24 = 0
-35 + -7x + 9x2 = 0

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

Divide each side by '9'.
-3.888888889 + -0.7777777778x + x2 = 0

Move the constant term to the right:

Add '3.888888889' to each side of the equation.
-3.888888889 + -0.7777777778x + 3.888888889 + x2 = 0 + 3.888888889

Reorder the terms:
-3.888888889 + 3.888888889 + -0.7777777778x + x2 = 0 + 3.888888889

Combine like terms: -3.888888889 + 3.888888889 = 0.000000000
0.000000000 + -0.7777777778x + x2 = 0 + 3.888888889
-0.7777777778x + x2 = 0 + 3.888888889

Combine like terms: 0 + 3.888888889 = 3.888888889
-0.7777777778x + x2 = 3.888888889

The x term is -0.7777777778x.  Take half its coefficient (-0.3888888889).
Square it (0.1512345679) and add it to both sides.

Add '0.1512345679' to each side of the equation.
-0.7777777778x + 0.1512345679 + x2 = 3.888888889 + 0.1512345679

Reorder the terms:
0.1512345679 + -0.7777777778x + x2 = 3.888888889 + 0.1512345679

Combine like terms: 3.888888889 + 0.1512345679 = 4.0401234569
0.1512345679 + -0.7777777778x + x2 = 4.0401234569

Factor a perfect square on the left side:
(x + -0.3888888889)(x + -0.3888888889) = 4.0401234569

Calculate the square root of the right side: 2.010005835

Break this problem into two subproblems by setting 
(x + -0.3888888889) equal to 2.010005835 and -2.010005835.

Subproblem 1

x + -0.3888888889 = 2.010005835 Simplifying x + -0.3888888889 = 2.010005835 Reorder the terms: -0.3888888889 + x = 2.010005835 Solving -0.3888888889 + x = 2.010005835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = 2.010005835 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = 2.010005835 + 0.3888888889 x = 2.010005835 + 0.3888888889 Combine like terms: 2.010005835 + 0.3888888889 = 2.3988947239 x = 2.3988947239 Simplifying x = 2.3988947239

Subproblem 2

x + -0.3888888889 = -2.010005835 Simplifying x + -0.3888888889 = -2.010005835 Reorder the terms: -0.3888888889 + x = -2.010005835 Solving -0.3888888889 + x = -2.010005835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = -2.010005835 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = -2.010005835 + 0.3888888889 x = -2.010005835 + 0.3888888889 Combine like terms: -2.010005835 + 0.3888888889 = -1.6211169461 x = -1.6211169461 Simplifying x = -1.6211169461

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.3988947239, -1.6211169461}

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