53.3=x^2-0.8x+.16

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Solution for 53.3=x^2-0.8x+.16 equation:


Simplifying
53.3 = x2 + -0.8x + 0.16

Reorder the terms:
53.3 = 0.16 + -0.8x + x2

Solving
53.3 = 0.16 + -0.8x + x2

Solving for variable 'x'.

Combine like terms: 53.3 + -0.16 = 53.14
53.14 + 0.8x + -1x2 = 0.16 + -0.8x + x2 + -0.16 + 0.8x + -1x2

Reorder the terms:
53.14 + 0.8x + -1x2 = 0.16 + -0.16 + -0.8x + 0.8x + x2 + -1x2

Combine like terms: 0.16 + -0.16 = 0.00
53.14 + 0.8x + -1x2 = 0.00 + -0.8x + 0.8x + x2 + -1x2
53.14 + 0.8x + -1x2 = -0.8x + 0.8x + x2 + -1x2

Combine like terms: -0.8x + 0.8x = 0.0
53.14 + 0.8x + -1x2 = 0.0 + x2 + -1x2
53.14 + 0.8x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
53.14 + 0.8x + -1x2 = 0

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

Divide each side by '-1'.
-53.14 + -0.8x + x2 = 0

Move the constant term to the right:

Add '53.14' to each side of the equation.
-53.14 + -0.8x + 53.14 + x2 = 0 + 53.14

Reorder the terms:
-53.14 + 53.14 + -0.8x + x2 = 0 + 53.14

Combine like terms: -53.14 + 53.14 = 0.00
0.00 + -0.8x + x2 = 0 + 53.14
-0.8x + x2 = 0 + 53.14

Combine like terms: 0 + 53.14 = 53.14
-0.8x + x2 = 53.14

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 53.14 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 53.14 + 0.16

Combine like terms: 53.14 + 0.16 = 53.3
0.16 + -0.8x + x2 = 53.3

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 53.3

Calculate the square root of the right side: 7.300684899

Break this problem into two subproblems by setting 
(x + -0.4) equal to 7.300684899 and -7.300684899.

Subproblem 1

x + -0.4 = 7.300684899 Simplifying x + -0.4 = 7.300684899 Reorder the terms: -0.4 + x = 7.300684899 Solving -0.4 + x = 7.300684899 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 7.300684899 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 7.300684899 + 0.4 x = 7.300684899 + 0.4 Combine like terms: 7.300684899 + 0.4 = 7.700684899 x = 7.700684899 Simplifying x = 7.700684899

Subproblem 2

x + -0.4 = -7.300684899 Simplifying x + -0.4 = -7.300684899 Reorder the terms: -0.4 + x = -7.300684899 Solving -0.4 + x = -7.300684899 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -7.300684899 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -7.300684899 + 0.4 x = -7.300684899 + 0.4 Combine like terms: -7.300684899 + 0.4 = -6.900684899 x = -6.900684899 Simplifying x = -6.900684899

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.700684899, -6.900684899}

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