8x-x^2=1.5

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Solution for 8x-x^2=1.5 equation:


Simplifying
8x + -1x2 = 1.5

Solving
8x + -1x2 = 1.5

Solving for variable 'x'.

Reorder the terms:
-1.5 + 8x + -1x2 = 1.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
-1.5 + 8x + -1x2 = 0.0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
1.5 + -8x + x2 = 0.0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + -8x + -1.5 + x2 = 0.0 + -1.5

Reorder the terms:
1.5 + -1.5 + -8x + x2 = 0.0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -8x + x2 = 0.0 + -1.5
-8x + x2 = 0.0 + -1.5

Combine like terms: 0.0 + -1.5 = -1.5
-8x + x2 = -1.5

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -1.5 + 16

Reorder the terms:
16 + -8x + x2 = -1.5 + 16

Combine like terms: -1.5 + 16 = 14.5
16 + -8x + x2 = 14.5

Factor a perfect square on the left side:
(x + -4)(x + -4) = 14.5

Calculate the square root of the right side: 3.807886553

Break this problem into two subproblems by setting 
(x + -4) equal to 3.807886553 and -3.807886553.

Subproblem 1

x + -4 = 3.807886553 Simplifying x + -4 = 3.807886553 Reorder the terms: -4 + x = 3.807886553 Solving -4 + x = 3.807886553 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 3.807886553 + 4 Combine like terms: -4 + 4 = 0 0 + x = 3.807886553 + 4 x = 3.807886553 + 4 Combine like terms: 3.807886553 + 4 = 7.807886553 x = 7.807886553 Simplifying x = 7.807886553

Subproblem 2

x + -4 = -3.807886553 Simplifying x + -4 = -3.807886553 Reorder the terms: -4 + x = -3.807886553 Solving -4 + x = -3.807886553 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -3.807886553 + 4 Combine like terms: -4 + 4 = 0 0 + x = -3.807886553 + 4 x = -3.807886553 + 4 Combine like terms: -3.807886553 + 4 = 0.192113447 x = 0.192113447 Simplifying x = 0.192113447

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.807886553, 0.192113447}

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