x^2=30x+27

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Solution for x^2=30x+27 equation:


Simplifying
x2 = 30x + 27

Reorder the terms:
x2 = 27 + 30x

Solving
x2 = 27 + 30x

Solving for variable 'x'.

Reorder the terms:
-27 + -30x + x2 = 27 + 30x + -27 + -30x

Reorder the terms:
-27 + -30x + x2 = 27 + -27 + 30x + -30x

Combine like terms: 27 + -27 = 0
-27 + -30x + x2 = 0 + 30x + -30x
-27 + -30x + x2 = 30x + -30x

Combine like terms: 30x + -30x = 0
-27 + -30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -30x + 27 + x2 = 0 + 27

Reorder the terms:
-27 + 27 + -30x + x2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -30x + x2 = 0 + 27
-30x + x2 = 0 + 27

Combine like terms: 0 + 27 = 27
-30x + x2 = 27

The x term is -30x.  Take half its coefficient (-15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
-30x + 225 + x2 = 27 + 225

Reorder the terms:
225 + -30x + x2 = 27 + 225

Combine like terms: 27 + 225 = 252
225 + -30x + x2 = 252

Factor a perfect square on the left side:
(x + -15)(x + -15) = 252

Calculate the square root of the right side: 15.874507866

Break this problem into two subproblems by setting 
(x + -15) equal to 15.874507866 and -15.874507866.

Subproblem 1

x + -15 = 15.874507866 Simplifying x + -15 = 15.874507866 Reorder the terms: -15 + x = 15.874507866 Solving -15 + x = 15.874507866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = 15.874507866 + 15 Combine like terms: -15 + 15 = 0 0 + x = 15.874507866 + 15 x = 15.874507866 + 15 Combine like terms: 15.874507866 + 15 = 30.874507866 x = 30.874507866 Simplifying x = 30.874507866

Subproblem 2

x + -15 = -15.874507866 Simplifying x + -15 = -15.874507866 Reorder the terms: -15 + x = -15.874507866 Solving -15 + x = -15.874507866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = -15.874507866 + 15 Combine like terms: -15 + 15 = 0 0 + x = -15.874507866 + 15 x = -15.874507866 + 15 Combine like terms: -15.874507866 + 15 = -0.874507866 x = -0.874507866 Simplifying x = -0.874507866

Solution

The solution to the problem is based on the solutions from the subproblems. x = {30.874507866, -0.874507866}

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