27x^2+5=42x

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Solution for 27x^2+5=42x equation:


Simplifying
27x2 + 5 = 42x

Reorder the terms:
5 + 27x2 = 42x

Solving
5 + 27x2 = 42x

Solving for variable 'x'.

Reorder the terms:
5 + -42x + 27x2 = 42x + -42x

Combine like terms: 42x + -42x = 0
5 + -42x + 27x2 = 0

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

Divide each side by '27'.
0.1851851852 + -1.555555556x + x2 = 0

Move the constant term to the right:

Add '-0.1851851852' to each side of the equation.
0.1851851852 + -1.555555556x + -0.1851851852 + x2 = 0 + -0.1851851852

Reorder the terms:
0.1851851852 + -0.1851851852 + -1.555555556x + x2 = 0 + -0.1851851852

Combine like terms: 0.1851851852 + -0.1851851852 = 0.0000000000
0.0000000000 + -1.555555556x + x2 = 0 + -0.1851851852
-1.555555556x + x2 = 0 + -0.1851851852

Combine like terms: 0 + -0.1851851852 = -0.1851851852
-1.555555556x + x2 = -0.1851851852

The x term is -1.555555556x.  Take half its coefficient (-0.777777778).
Square it (0.6049382720) and add it to both sides.

Add '0.6049382720' to each side of the equation.
-1.555555556x + 0.6049382720 + x2 = -0.1851851852 + 0.6049382720

Reorder the terms:
0.6049382720 + -1.555555556x + x2 = -0.1851851852 + 0.6049382720

Combine like terms: -0.1851851852 + 0.6049382720 = 0.4197530868
0.6049382720 + -1.555555556x + x2 = 0.4197530868

Factor a perfect square on the left side:
(x + -0.777777778)(x + -0.777777778) = 0.4197530868

Calculate the square root of the right side: 0.647883544

Break this problem into two subproblems by setting 
(x + -0.777777778) equal to 0.647883544 and -0.647883544.

Subproblem 1

x + -0.777777778 = 0.647883544 Simplifying x + -0.777777778 = 0.647883544 Reorder the terms: -0.777777778 + x = 0.647883544 Solving -0.777777778 + x = 0.647883544 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.777777778' to each side of the equation. -0.777777778 + 0.777777778 + x = 0.647883544 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + x = 0.647883544 + 0.777777778 x = 0.647883544 + 0.777777778 Combine like terms: 0.647883544 + 0.777777778 = 1.425661322 x = 1.425661322 Simplifying x = 1.425661322

Subproblem 2

x + -0.777777778 = -0.647883544 Simplifying x + -0.777777778 = -0.647883544 Reorder the terms: -0.777777778 + x = -0.647883544 Solving -0.777777778 + x = -0.647883544 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.777777778' to each side of the equation. -0.777777778 + 0.777777778 + x = -0.647883544 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + x = -0.647883544 + 0.777777778 x = -0.647883544 + 0.777777778 Combine like terms: -0.647883544 + 0.777777778 = 0.129894234 x = 0.129894234 Simplifying x = 0.129894234

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.425661322, 0.129894234}

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