4X^2+3.8X-10.35=0

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Solution for 4X^2+3.8X-10.35=0 equation:


Simplifying
4X2 + 3.8X + -10.35 = 0

Reorder the terms:
-10.35 + 3.8X + 4X2 = 0

Solving
-10.35 + 3.8X + 4X2 = 0

Solving for variable 'X'.

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

Divide each side by '4'.
-2.5875 + 0.95X + X2 = 0

Move the constant term to the right:

Add '2.5875' to each side of the equation.
-2.5875 + 0.95X + 2.5875 + X2 = 0 + 2.5875

Reorder the terms:
-2.5875 + 2.5875 + 0.95X + X2 = 0 + 2.5875

Combine like terms: -2.5875 + 2.5875 = 0.0000
0.0000 + 0.95X + X2 = 0 + 2.5875
0.95X + X2 = 0 + 2.5875

Combine like terms: 0 + 2.5875 = 2.5875
0.95X + X2 = 2.5875

The X term is 0.95X.  Take half its coefficient (0.475).
Square it (0.225625) and add it to both sides.

Add '0.225625' to each side of the equation.
0.95X + 0.225625 + X2 = 2.5875 + 0.225625

Reorder the terms:
0.225625 + 0.95X + X2 = 2.5875 + 0.225625

Combine like terms: 2.5875 + 0.225625 = 2.813125
0.225625 + 0.95X + X2 = 2.813125

Factor a perfect square on the left side:
(X + 0.475)(X + 0.475) = 2.813125

Calculate the square root of the right side: 1.677237312

Break this problem into two subproblems by setting 
(X + 0.475) equal to 1.677237312 and -1.677237312.

Subproblem 1

X + 0.475 = 1.677237312 Simplifying X + 0.475 = 1.677237312 Reorder the terms: 0.475 + X = 1.677237312 Solving 0.475 + X = 1.677237312 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.475' to each side of the equation. 0.475 + -0.475 + X = 1.677237312 + -0.475 Combine like terms: 0.475 + -0.475 = 0.000 0.000 + X = 1.677237312 + -0.475 X = 1.677237312 + -0.475 Combine like terms: 1.677237312 + -0.475 = 1.202237312 X = 1.202237312 Simplifying X = 1.202237312

Subproblem 2

X + 0.475 = -1.677237312 Simplifying X + 0.475 = -1.677237312 Reorder the terms: 0.475 + X = -1.677237312 Solving 0.475 + X = -1.677237312 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.475' to each side of the equation. 0.475 + -0.475 + X = -1.677237312 + -0.475 Combine like terms: 0.475 + -0.475 = 0.000 0.000 + X = -1.677237312 + -0.475 X = -1.677237312 + -0.475 Combine like terms: -1.677237312 + -0.475 = -2.152237312 X = -2.152237312 Simplifying X = -2.152237312

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.202237312, -2.152237312}

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