x^2-3x-21150=0

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Solution for x^2-3x-21150=0 equation:


Simplifying
x2 + -3x + -21150 = 0

Reorder the terms:
-21150 + -3x + x2 = 0

Solving
-21150 + -3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '21150' to each side of the equation.
-21150 + -3x + 21150 + x2 = 0 + 21150

Reorder the terms:
-21150 + 21150 + -3x + x2 = 0 + 21150

Combine like terms: -21150 + 21150 = 0
0 + -3x + x2 = 0 + 21150
-3x + x2 = 0 + 21150

Combine like terms: 0 + 21150 = 21150
-3x + x2 = 21150

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 = 21150 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 21150 + 2.25

Combine like terms: 21150 + 2.25 = 21152.25
2.25 + -3x + x2 = 21152.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 21152.25

Calculate the square root of the right side: 145.438131176

Break this problem into two subproblems by setting 
(x + -1.5) equal to 145.438131176 and -145.438131176.

Subproblem 1

x + -1.5 = 145.438131176 Simplifying x + -1.5 = 145.438131176 Reorder the terms: -1.5 + x = 145.438131176 Solving -1.5 + x = 145.438131176 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 = 145.438131176 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 145.438131176 + 1.5 x = 145.438131176 + 1.5 Combine like terms: 145.438131176 + 1.5 = 146.938131176 x = 146.938131176 Simplifying x = 146.938131176

Subproblem 2

x + -1.5 = -145.438131176 Simplifying x + -1.5 = -145.438131176 Reorder the terms: -1.5 + x = -145.438131176 Solving -1.5 + x = -145.438131176 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 = -145.438131176 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -145.438131176 + 1.5 x = -145.438131176 + 1.5 Combine like terms: -145.438131176 + 1.5 = -143.938131176 x = -143.938131176 Simplifying x = -143.938131176

Solution

The solution to the problem is based on the solutions from the subproblems. x = {146.938131176, -143.938131176}

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