-0.125x^2+2x-6=1.4

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Solution for -0.125x^2+2x-6=1.4 equation:


Simplifying
-0.125x2 + 2x + -6 = 1.4

Reorder the terms:
-6 + 2x + -0.125x2 = 1.4

Solving
-6 + 2x + -0.125x2 = 1.4

Solving for variable 'x'.

Reorder the terms:
-6 + -1.4 + 2x + -0.125x2 = 1.4 + -1.4

Combine like terms: -6 + -1.4 = -7.4
-7.4 + 2x + -0.125x2 = 1.4 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
-7.4 + 2x + -0.125x2 = 0.0

Begin completing the square.  Divide all terms by
-0.125 the coefficient of the squared term: 

Divide each side by '-0.125'.
59.2 + -16x + x2 = 0

Move the constant term to the right:

Add '-59.2' to each side of the equation.
59.2 + -16x + -59.2 + x2 = 0 + -59.2

Reorder the terms:
59.2 + -59.2 + -16x + x2 = 0 + -59.2

Combine like terms: 59.2 + -59.2 = 0.0
0.0 + -16x + x2 = 0 + -59.2
-16x + x2 = 0 + -59.2

Combine like terms: 0 + -59.2 = -59.2
-16x + x2 = -59.2

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = -59.2 + 64

Reorder the terms:
64 + -16x + x2 = -59.2 + 64

Combine like terms: -59.2 + 64 = 4.8
64 + -16x + x2 = 4.8

Factor a perfect square on the left side:
(x + -8)(x + -8) = 4.8

Calculate the square root of the right side: 2.19089023

Break this problem into two subproblems by setting 
(x + -8) equal to 2.19089023 and -2.19089023.

Subproblem 1

x + -8 = 2.19089023 Simplifying x + -8 = 2.19089023 Reorder the terms: -8 + x = 2.19089023 Solving -8 + x = 2.19089023 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 2.19089023 + 8 Combine like terms: -8 + 8 = 0 0 + x = 2.19089023 + 8 x = 2.19089023 + 8 Combine like terms: 2.19089023 + 8 = 10.19089023 x = 10.19089023 Simplifying x = 10.19089023

Subproblem 2

x + -8 = -2.19089023 Simplifying x + -8 = -2.19089023 Reorder the terms: -8 + x = -2.19089023 Solving -8 + x = -2.19089023 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -2.19089023 + 8 Combine like terms: -8 + 8 = 0 0 + x = -2.19089023 + 8 x = -2.19089023 + 8 Combine like terms: -2.19089023 + 8 = 5.80910977 x = 5.80910977 Simplifying x = 5.80910977

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.19089023, 5.80910977}

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