x^2+3x-650=0

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Solution for x^2+3x-650=0 equation:


Simplifying
x2 + 3x + -650 = 0

Reorder the terms:
-650 + 3x + x2 = 0

Solving
-650 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '650' to each side of the equation.
-650 + 3x + 650 + x2 = 0 + 650

Reorder the terms:
-650 + 650 + 3x + x2 = 0 + 650

Combine like terms: -650 + 650 = 0
0 + 3x + x2 = 0 + 650
3x + x2 = 0 + 650

Combine like terms: 0 + 650 = 650
3x + x2 = 650

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 = 650 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 650 + 2.25

Combine like terms: 650 + 2.25 = 652.25
2.25 + 3x + x2 = 652.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 652.25

Calculate the square root of the right side: 25.539185578

Break this problem into two subproblems by setting 
(x + 1.5) equal to 25.539185578 and -25.539185578.

Subproblem 1

x + 1.5 = 25.539185578 Simplifying x + 1.5 = 25.539185578 Reorder the terms: 1.5 + x = 25.539185578 Solving 1.5 + x = 25.539185578 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 = 25.539185578 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 25.539185578 + -1.5 x = 25.539185578 + -1.5 Combine like terms: 25.539185578 + -1.5 = 24.039185578 x = 24.039185578 Simplifying x = 24.039185578

Subproblem 2

x + 1.5 = -25.539185578 Simplifying x + 1.5 = -25.539185578 Reorder the terms: 1.5 + x = -25.539185578 Solving 1.5 + x = -25.539185578 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 = -25.539185578 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -25.539185578 + -1.5 x = -25.539185578 + -1.5 Combine like terms: -25.539185578 + -1.5 = -27.039185578 x = -27.039185578 Simplifying x = -27.039185578

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.039185578, -27.039185578}

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