2x^2+3x=380

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


Simplifying
2x2 + 3x = 380

Reorder the terms:
3x + 2x2 = 380

Solving
3x + 2x2 = 380

Solving for variable 'x'.

Reorder the terms:
-380 + 3x + 2x2 = 380 + -380

Combine like terms: 380 + -380 = 0
-380 + 3x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-190 + 1.5x + x2 = 0

Move the constant term to the right:

Add '190' to each side of the equation.
-190 + 1.5x + 190 + x2 = 0 + 190

Reorder the terms:
-190 + 190 + 1.5x + x2 = 0 + 190

Combine like terms: -190 + 190 = 0
0 + 1.5x + x2 = 0 + 190
1.5x + x2 = 0 + 190

Combine like terms: 0 + 190 = 190
1.5x + x2 = 190

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 190 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 190 + 0.5625

Combine like terms: 190 + 0.5625 = 190.5625
0.5625 + 1.5x + x2 = 190.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 190.5625

Calculate the square root of the right side: 13.804437692

Break this problem into two subproblems by setting 
(x + 0.75) equal to 13.804437692 and -13.804437692.

Subproblem 1

x + 0.75 = 13.804437692 Simplifying x + 0.75 = 13.804437692 Reorder the terms: 0.75 + x = 13.804437692 Solving 0.75 + x = 13.804437692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 13.804437692 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 13.804437692 + -0.75 x = 13.804437692 + -0.75 Combine like terms: 13.804437692 + -0.75 = 13.054437692 x = 13.054437692 Simplifying x = 13.054437692

Subproblem 2

x + 0.75 = -13.804437692 Simplifying x + 0.75 = -13.804437692 Reorder the terms: 0.75 + x = -13.804437692 Solving 0.75 + x = -13.804437692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -13.804437692 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -13.804437692 + -0.75 x = -13.804437692 + -0.75 Combine like terms: -13.804437692 + -0.75 = -14.554437692 x = -14.554437692 Simplifying x = -14.554437692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.054437692, -14.554437692}

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