x^2-3x-147=0

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Solution for x^2-3x-147=0 equation:


Simplifying
x2 + -3x + -147 = 0

Reorder the terms:
-147 + -3x + x2 = 0

Solving
-147 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '147' to each side of the equation.
-147 + -3x + 147 + x2 = 0 + 147

Reorder the terms:
-147 + 147 + -3x + x2 = 0 + 147

Combine like terms: -147 + 147 = 0
0 + -3x + x2 = 0 + 147
-3x + x2 = 0 + 147

Combine like terms: 0 + 147 = 147
-3x + x2 = 147

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 147 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 147 + 2.25

Combine like terms: 147 + 2.25 = 149.25
2.25 + -3x + x2 = 149.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 149.25

Calculate the square root of the right side: 12.216791723

Break this problem into two subproblems by setting 
(x + -1.5) equal to 12.216791723 and -12.216791723.

Subproblem 1

x + -1.5 = 12.216791723 Simplifying x + -1.5 = 12.216791723 Reorder the terms: -1.5 + x = 12.216791723 Solving -1.5 + x = 12.216791723 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 12.216791723 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 12.216791723 + 1.5 x = 12.216791723 + 1.5 Combine like terms: 12.216791723 + 1.5 = 13.716791723 x = 13.716791723 Simplifying x = 13.716791723

Subproblem 2

x + -1.5 = -12.216791723 Simplifying x + -1.5 = -12.216791723 Reorder the terms: -1.5 + x = -12.216791723 Solving -1.5 + x = -12.216791723 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -12.216791723 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -12.216791723 + 1.5 x = -12.216791723 + 1.5 Combine like terms: -12.216791723 + 1.5 = -10.716791723 x = -10.716791723 Simplifying x = -10.716791723

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.716791723, -10.716791723}

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