x^2+3.8x-47.272=0

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Solution for x^2+3.8x-47.272=0 equation:


Simplifying
x2 + 3.8x + -47.272 = 0

Reorder the terms:
-47.272 + 3.8x + x2 = 0

Solving
-47.272 + 3.8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '47.272' to each side of the equation.
-47.272 + 3.8x + 47.272 + x2 = 0 + 47.272

Reorder the terms:
-47.272 + 47.272 + 3.8x + x2 = 0 + 47.272

Combine like terms: -47.272 + 47.272 = 0.000
0.000 + 3.8x + x2 = 0 + 47.272
3.8x + x2 = 0 + 47.272

Combine like terms: 0 + 47.272 = 47.272
3.8x + x2 = 47.272

The x term is 3.8x.  Take half its coefficient (1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
3.8x + 3.61 + x2 = 47.272 + 3.61

Reorder the terms:
3.61 + 3.8x + x2 = 47.272 + 3.61

Combine like terms: 47.272 + 3.61 = 50.882
3.61 + 3.8x + x2 = 50.882

Factor a perfect square on the left side:
(x + 1.9)(x + 1.9) = 50.882

Calculate the square root of the right side: 7.133161992

Break this problem into two subproblems by setting 
(x + 1.9) equal to 7.133161992 and -7.133161992.

Subproblem 1

x + 1.9 = 7.133161992 Simplifying x + 1.9 = 7.133161992 Reorder the terms: 1.9 + x = 7.133161992 Solving 1.9 + x = 7.133161992 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = 7.133161992 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = 7.133161992 + -1.9 x = 7.133161992 + -1.9 Combine like terms: 7.133161992 + -1.9 = 5.233161992 x = 5.233161992 Simplifying x = 5.233161992

Subproblem 2

x + 1.9 = -7.133161992 Simplifying x + 1.9 = -7.133161992 Reorder the terms: 1.9 + x = -7.133161992 Solving 1.9 + x = -7.133161992 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.9' to each side of the equation. 1.9 + -1.9 + x = -7.133161992 + -1.9 Combine like terms: 1.9 + -1.9 = 0.0 0.0 + x = -7.133161992 + -1.9 x = -7.133161992 + -1.9 Combine like terms: -7.133161992 + -1.9 = -9.033161992 x = -9.033161992 Simplifying x = -9.033161992

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.233161992, -9.033161992}

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