x^2+3x-380=0

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Solution for x^2+3x-380=0 equation:


Simplifying
x2 + 3x + -380 = 0

Reorder the terms:
-380 + 3x + x2 = 0

Solving
-380 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '380' to each side of the equation.
-380 + 3x + 380 + x2 = 0 + 380

Reorder the terms:
-380 + 380 + 3x + x2 = 0 + 380

Combine like terms: -380 + 380 = 0
0 + 3x + x2 = 0 + 380
3x + x2 = 0 + 380

Combine like terms: 0 + 380 = 380
3x + x2 = 380

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 = 380 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 380 + 2.25

Combine like terms: 380 + 2.25 = 382.25
2.25 + 3x + x2 = 382.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 382.25

Calculate the square root of the right side: 19.551214796

Break this problem into two subproblems by setting 
(x + 1.5) equal to 19.551214796 and -19.551214796.

Subproblem 1

x + 1.5 = 19.551214796 Simplifying x + 1.5 = 19.551214796 Reorder the terms: 1.5 + x = 19.551214796 Solving 1.5 + x = 19.551214796 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 = 19.551214796 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 19.551214796 + -1.5 x = 19.551214796 + -1.5 Combine like terms: 19.551214796 + -1.5 = 18.051214796 x = 18.051214796 Simplifying x = 18.051214796

Subproblem 2

x + 1.5 = -19.551214796 Simplifying x + 1.5 = -19.551214796 Reorder the terms: 1.5 + x = -19.551214796 Solving 1.5 + x = -19.551214796 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 = -19.551214796 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -19.551214796 + -1.5 x = -19.551214796 + -1.5 Combine like terms: -19.551214796 + -1.5 = -21.051214796 x = -21.051214796 Simplifying x = -21.051214796

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.051214796, -21.051214796}

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