x^2+1.88x-1.18=0

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Solution for x^2+1.88x-1.18=0 equation:


Simplifying
x2 + 1.88x + -1.18 = 0

Reorder the terms:
-1.18 + 1.88x + x2 = 0

Solving
-1.18 + 1.88x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.18' to each side of the equation.
-1.18 + 1.88x + 1.18 + x2 = 0 + 1.18

Reorder the terms:
-1.18 + 1.18 + 1.88x + x2 = 0 + 1.18

Combine like terms: -1.18 + 1.18 = 0.00
0.00 + 1.88x + x2 = 0 + 1.18
1.88x + x2 = 0 + 1.18

Combine like terms: 0 + 1.18 = 1.18
1.88x + x2 = 1.18

The x term is 1.88x.  Take half its coefficient (0.94).
Square it (0.8836) and add it to both sides.

Add '0.8836' to each side of the equation.
1.88x + 0.8836 + x2 = 1.18 + 0.8836

Reorder the terms:
0.8836 + 1.88x + x2 = 1.18 + 0.8836

Combine like terms: 1.18 + 0.8836 = 2.0636
0.8836 + 1.88x + x2 = 2.0636

Factor a perfect square on the left side:
(x + 0.94)(x + 0.94) = 2.0636

Calculate the square root of the right side: 1.436523581

Break this problem into two subproblems by setting 
(x + 0.94) equal to 1.436523581 and -1.436523581.

Subproblem 1

x + 0.94 = 1.436523581 Simplifying x + 0.94 = 1.436523581 Reorder the terms: 0.94 + x = 1.436523581 Solving 0.94 + x = 1.436523581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.94' to each side of the equation. 0.94 + -0.94 + x = 1.436523581 + -0.94 Combine like terms: 0.94 + -0.94 = 0.00 0.00 + x = 1.436523581 + -0.94 x = 1.436523581 + -0.94 Combine like terms: 1.436523581 + -0.94 = 0.496523581 x = 0.496523581 Simplifying x = 0.496523581

Subproblem 2

x + 0.94 = -1.436523581 Simplifying x + 0.94 = -1.436523581 Reorder the terms: 0.94 + x = -1.436523581 Solving 0.94 + x = -1.436523581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.94' to each side of the equation. 0.94 + -0.94 + x = -1.436523581 + -0.94 Combine like terms: 0.94 + -0.94 = 0.00 0.00 + x = -1.436523581 + -0.94 x = -1.436523581 + -0.94 Combine like terms: -1.436523581 + -0.94 = -2.376523581 x = -2.376523581 Simplifying x = -2.376523581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.496523581, -2.376523581}

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