=-2.4x^2+14.2x+10

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Solution for =-2.4x^2+14.2x+10 equation:


Simplifying
0 = -2.4x2 + 14.2x + 10

Reorder the terms:
0 = 10 + 14.2x + -2.4x2

Solving
0 = 10 + 14.2x + -2.4x2

Solving for variable 'x'.

Combine like terms: 0 + -10 = -10
-10 + -14.2x + 2.4x2 = 10 + 14.2x + -2.4x2 + -10 + -14.2x + 2.4x2

Reorder the terms:
-10 + -14.2x + 2.4x2 = 10 + -10 + 14.2x + -14.2x + -2.4x2 + 2.4x2

Combine like terms: 10 + -10 = 0
-10 + -14.2x + 2.4x2 = 0 + 14.2x + -14.2x + -2.4x2 + 2.4x2
-10 + -14.2x + 2.4x2 = 14.2x + -14.2x + -2.4x2 + 2.4x2

Combine like terms: 14.2x + -14.2x = 0.0
-10 + -14.2x + 2.4x2 = 0.0 + -2.4x2 + 2.4x2
-10 + -14.2x + 2.4x2 = -2.4x2 + 2.4x2

Combine like terms: -2.4x2 + 2.4x2 = 0.0
-10 + -14.2x + 2.4x2 = 0.0

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

Divide each side by '2.4'.
-4.166666667 + -5.916666667x + x2 = 0

Move the constant term to the right:

Add '4.166666667' to each side of the equation.
-4.166666667 + -5.916666667x + 4.166666667 + x2 = 0 + 4.166666667

Reorder the terms:
-4.166666667 + 4.166666667 + -5.916666667x + x2 = 0 + 4.166666667

Combine like terms: -4.166666667 + 4.166666667 = 0.000000000
0.000000000 + -5.916666667x + x2 = 0 + 4.166666667
-5.916666667x + x2 = 0 + 4.166666667

Combine like terms: 0 + 4.166666667 = 4.166666667
-5.916666667x + x2 = 4.166666667

The x term is -5.916666667x.  Take half its coefficient (-2.958333334).
Square it (8.751736115) and add it to both sides.

Add '8.751736115' to each side of the equation.
-5.916666667x + 8.751736115 + x2 = 4.166666667 + 8.751736115

Reorder the terms:
8.751736115 + -5.916666667x + x2 = 4.166666667 + 8.751736115

Combine like terms: 4.166666667 + 8.751736115 = 12.918402782
8.751736115 + -5.916666667x + x2 = 12.918402782

Factor a perfect square on the left side:
(x + -2.958333334)(x + -2.958333334) = 12.918402782

Calculate the square root of the right side: 3.594217965

Break this problem into two subproblems by setting 
(x + -2.958333334) equal to 3.594217965 and -3.594217965.

Subproblem 1

x + -2.958333334 = 3.594217965 Simplifying x + -2.958333334 = 3.594217965 Reorder the terms: -2.958333334 + x = 3.594217965 Solving -2.958333334 + x = 3.594217965 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.958333334' to each side of the equation. -2.958333334 + 2.958333334 + x = 3.594217965 + 2.958333334 Combine like terms: -2.958333334 + 2.958333334 = 0.000000000 0.000000000 + x = 3.594217965 + 2.958333334 x = 3.594217965 + 2.958333334 Combine like terms: 3.594217965 + 2.958333334 = 6.552551299 x = 6.552551299 Simplifying x = 6.552551299

Subproblem 2

x + -2.958333334 = -3.594217965 Simplifying x + -2.958333334 = -3.594217965 Reorder the terms: -2.958333334 + x = -3.594217965 Solving -2.958333334 + x = -3.594217965 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.958333334' to each side of the equation. -2.958333334 + 2.958333334 + x = -3.594217965 + 2.958333334 Combine like terms: -2.958333334 + 2.958333334 = 0.000000000 0.000000000 + x = -3.594217965 + 2.958333334 x = -3.594217965 + 2.958333334 Combine like terms: -3.594217965 + 2.958333334 = -0.635884631 x = -0.635884631 Simplifying x = -0.635884631

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.552551299, -0.635884631}

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