x^2-1.4x+0.24=0

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Solution for x^2-1.4x+0.24=0 equation:


Simplifying
x2 + -1.4x + 0.24 = 0

Reorder the terms:
0.24 + -1.4x + x2 = 0

Solving
0.24 + -1.4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.24' to each side of the equation.
0.24 + -1.4x + -0.24 + x2 = 0 + -0.24

Reorder the terms:
0.24 + -0.24 + -1.4x + x2 = 0 + -0.24

Combine like terms: 0.24 + -0.24 = 0.00
0.00 + -1.4x + x2 = 0 + -0.24
-1.4x + x2 = 0 + -0.24

Combine like terms: 0 + -0.24 = -0.24
-1.4x + x2 = -0.24

The x term is -1.4x.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4x + 0.49 + x2 = -0.24 + 0.49

Reorder the terms:
0.49 + -1.4x + x2 = -0.24 + 0.49

Combine like terms: -0.24 + 0.49 = 0.25
0.49 + -1.4x + x2 = 0.25

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = 0.25

Calculate the square root of the right side: 0.5

Break this problem into two subproblems by setting 
(x + -0.7) equal to 0.5 and -0.5.

Subproblem 1

x + -0.7 = 0.5 Simplifying x + -0.7 = 0.5 Reorder the terms: -0.7 + x = 0.5 Solving -0.7 + x = 0.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = 0.5 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = 0.5 + 0.7 x = 0.5 + 0.7 Combine like terms: 0.5 + 0.7 = 1.2 x = 1.2 Simplifying x = 1.2

Subproblem 2

x + -0.7 = -0.5 Simplifying x + -0.7 = -0.5 Reorder the terms: -0.7 + x = -0.5 Solving -0.7 + x = -0.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + x = -0.5 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + x = -0.5 + 0.7 x = -0.5 + 0.7 Combine like terms: -0.5 + 0.7 = 0.2 x = 0.2 Simplifying x = 0.2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2, 0.2}

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