x^2+x-465=0

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Solution for x^2+x-465=0 equation:


Simplifying
x2 + x + -465 = 0

Reorder the terms:
-465 + x + x2 = 0

Solving
-465 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '465' to each side of the equation.
-465 + x + 465 + x2 = 0 + 465

Reorder the terms:
-465 + 465 + x + x2 = 0 + 465

Combine like terms: -465 + 465 = 0
0 + x + x2 = 0 + 465
x + x2 = 0 + 465

Combine like terms: 0 + 465 = 465
x + x2 = 465

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 465 + 0.25

Reorder the terms:
0.25 + x + x2 = 465 + 0.25

Combine like terms: 465 + 0.25 = 465.25
0.25 + x + x2 = 465.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 465.25

Calculate the square root of the right side: 21.56965461

Break this problem into two subproblems by setting 
(x + 0.5) equal to 21.56965461 and -21.56965461.

Subproblem 1

x + 0.5 = 21.56965461 Simplifying x + 0.5 = 21.56965461 Reorder the terms: 0.5 + x = 21.56965461 Solving 0.5 + x = 21.56965461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 21.56965461 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 21.56965461 + -0.5 x = 21.56965461 + -0.5 Combine like terms: 21.56965461 + -0.5 = 21.06965461 x = 21.06965461 Simplifying x = 21.06965461

Subproblem 2

x + 0.5 = -21.56965461 Simplifying x + 0.5 = -21.56965461 Reorder the terms: 0.5 + x = -21.56965461 Solving 0.5 + x = -21.56965461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -21.56965461 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -21.56965461 + -0.5 x = -21.56965461 + -0.5 Combine like terms: -21.56965461 + -0.5 = -22.06965461 x = -22.06965461 Simplifying x = -22.06965461

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.06965461, -22.06965461}

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