x^2-2.4x-1.2=0

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Solution for x^2-2.4x-1.2=0 equation:


Simplifying
x2 + -2.4x + -1.2 = 0

Reorder the terms:
-1.2 + -2.4x + x2 = 0

Solving
-1.2 + -2.4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -2.4x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -2.4x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -2.4x + x2 = 0 + 1.2
-2.4x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-2.4x + x2 = 1.2

The x term is -2.4x.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4x + 1.44 + x2 = 1.2 + 1.44

Reorder the terms:
1.44 + -2.4x + x2 = 1.2 + 1.44

Combine like terms: 1.2 + 1.44 = 2.64
1.44 + -2.4x + x2 = 2.64

Factor a perfect square on the left side:
(x + -1.2)(x + -1.2) = 2.64

Calculate the square root of the right side: 1.624807681

Break this problem into two subproblems by setting 
(x + -1.2) equal to 1.624807681 and -1.624807681.

Subproblem 1

x + -1.2 = 1.624807681 Simplifying x + -1.2 = 1.624807681 Reorder the terms: -1.2 + x = 1.624807681 Solving -1.2 + x = 1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + x = 1.624807681 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + x = 1.624807681 + 1.2 x = 1.624807681 + 1.2 Combine like terms: 1.624807681 + 1.2 = 2.824807681 x = 2.824807681 Simplifying x = 2.824807681

Subproblem 2

x + -1.2 = -1.624807681 Simplifying x + -1.2 = -1.624807681 Reorder the terms: -1.2 + x = -1.624807681 Solving -1.2 + x = -1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + x = -1.624807681 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + x = -1.624807681 + 1.2 x = -1.624807681 + 1.2 Combine like terms: -1.624807681 + 1.2 = -0.424807681 x = -0.424807681 Simplifying x = -0.424807681

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.824807681, -0.424807681}

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