9x^2+4x-10=0

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Solution for 9x^2+4x-10=0 equation:


Simplifying
9x2 + 4x + -10 = 0

Reorder the terms:
-10 + 4x + 9x2 = 0

Solving
-10 + 4x + 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'.
-1.111111111 + 0.4444444444x + x2 = 0

Move the constant term to the right:

Add '1.111111111' to each side of the equation.
-1.111111111 + 0.4444444444x + 1.111111111 + x2 = 0 + 1.111111111

Reorder the terms:
-1.111111111 + 1.111111111 + 0.4444444444x + x2 = 0 + 1.111111111

Combine like terms: -1.111111111 + 1.111111111 = 0.000000000
0.000000000 + 0.4444444444x + x2 = 0 + 1.111111111
0.4444444444x + x2 = 0 + 1.111111111

Combine like terms: 0 + 1.111111111 = 1.111111111
0.4444444444x + x2 = 1.111111111

The x term is 0.4444444444x.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444x + 0.04938271604 + x2 = 1.111111111 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444x + x2 = 1.111111111 + 0.04938271604

Combine like terms: 1.111111111 + 0.04938271604 = 1.16049382704
0.04938271604 + 0.4444444444x + x2 = 1.16049382704

Factor a perfect square on the left side:
(x + 0.2222222222)(x + 0.2222222222) = 1.16049382704

Calculate the square root of the right side: 1.07726219

Break this problem into two subproblems by setting 
(x + 0.2222222222) equal to 1.07726219 and -1.07726219.

Subproblem 1

x + 0.2222222222 = 1.07726219 Simplifying x + 0.2222222222 = 1.07726219 Reorder the terms: 0.2222222222 + x = 1.07726219 Solving 0.2222222222 + x = 1.07726219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = 1.07726219 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = 1.07726219 + -0.2222222222 x = 1.07726219 + -0.2222222222 Combine like terms: 1.07726219 + -0.2222222222 = 0.8550399678 x = 0.8550399678 Simplifying x = 0.8550399678

Subproblem 2

x + 0.2222222222 = -1.07726219 Simplifying x + 0.2222222222 = -1.07726219 Reorder the terms: 0.2222222222 + x = -1.07726219 Solving 0.2222222222 + x = -1.07726219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = -1.07726219 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = -1.07726219 + -0.2222222222 x = -1.07726219 + -0.2222222222 Combine like terms: -1.07726219 + -0.2222222222 = -1.2994844122 x = -1.2994844122 Simplifying x = -1.2994844122

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8550399678, -1.2994844122}

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