5x^2+3x-27=

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Solution for 5x^2+3x-27= equation:


Simplifying
5x2 + 3x + -27 = 0

Reorder the terms:
-27 + 3x + 5x2 = 0

Solving
-27 + 3x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-5.4 + 0.6x + x2 = 0

Move the constant term to the right:

Add '5.4' to each side of the equation.
-5.4 + 0.6x + 5.4 + x2 = 0 + 5.4

Reorder the terms:
-5.4 + 5.4 + 0.6x + x2 = 0 + 5.4

Combine like terms: -5.4 + 5.4 = 0.0
0.0 + 0.6x + x2 = 0 + 5.4
0.6x + x2 = 0 + 5.4

Combine like terms: 0 + 5.4 = 5.4
0.6x + x2 = 5.4

The x term is 0.6x.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6x + 0.09 + x2 = 5.4 + 0.09

Reorder the terms:
0.09 + 0.6x + x2 = 5.4 + 0.09

Combine like terms: 5.4 + 0.09 = 5.49
0.09 + 0.6x + x2 = 5.49

Factor a perfect square on the left side:
(x + 0.3)(x + 0.3) = 5.49

Calculate the square root of the right side: 2.343074903

Break this problem into two subproblems by setting 
(x + 0.3) equal to 2.343074903 and -2.343074903.

Subproblem 1

x + 0.3 = 2.343074903 Simplifying x + 0.3 = 2.343074903 Reorder the terms: 0.3 + x = 2.343074903 Solving 0.3 + x = 2.343074903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 2.343074903 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 2.343074903 + -0.3 x = 2.343074903 + -0.3 Combine like terms: 2.343074903 + -0.3 = 2.043074903 x = 2.043074903 Simplifying x = 2.043074903

Subproblem 2

x + 0.3 = -2.343074903 Simplifying x + 0.3 = -2.343074903 Reorder the terms: 0.3 + x = -2.343074903 Solving 0.3 + x = -2.343074903 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -2.343074903 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -2.343074903 + -0.3 x = -2.343074903 + -0.3 Combine like terms: -2.343074903 + -0.3 = -2.643074903 x = -2.643074903 Simplifying x = -2.643074903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.043074903, -2.643074903}

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