8x^2+18x-41=-10

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Solution for 8x^2+18x-41=-10 equation:


Simplifying
8x2 + 18x + -41 = -10

Reorder the terms:
-41 + 18x + 8x2 = -10

Solving
-41 + 18x + 8x2 = -10

Solving for variable 'x'.

Reorder the terms:
-41 + 10 + 18x + 8x2 = -10 + 10

Combine like terms: -41 + 10 = -31
-31 + 18x + 8x2 = -10 + 10

Combine like terms: -10 + 10 = 0
-31 + 18x + 8x2 = 0

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

Divide each side by '8'.
-3.875 + 2.25x + x2 = 0

Move the constant term to the right:

Add '3.875' to each side of the equation.
-3.875 + 2.25x + 3.875 + x2 = 0 + 3.875

Reorder the terms:
-3.875 + 3.875 + 2.25x + x2 = 0 + 3.875

Combine like terms: -3.875 + 3.875 = 0.000
0.000 + 2.25x + x2 = 0 + 3.875
2.25x + x2 = 0 + 3.875

Combine like terms: 0 + 3.875 = 3.875
2.25x + x2 = 3.875

The x term is 2.25x.  Take half its coefficient (1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
2.25x + 1.265625 + x2 = 3.875 + 1.265625

Reorder the terms:
1.265625 + 2.25x + x2 = 3.875 + 1.265625

Combine like terms: 3.875 + 1.265625 = 5.140625
1.265625 + 2.25x + x2 = 5.140625

Factor a perfect square on the left side:
(x + 1.125)(x + 1.125) = 5.140625

Calculate the square root of the right side: 2.267294643

Break this problem into two subproblems by setting 
(x + 1.125) equal to 2.267294643 and -2.267294643.

Subproblem 1

x + 1.125 = 2.267294643 Simplifying x + 1.125 = 2.267294643 Reorder the terms: 1.125 + x = 2.267294643 Solving 1.125 + x = 2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = 2.267294643 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = 2.267294643 + -1.125 x = 2.267294643 + -1.125 Combine like terms: 2.267294643 + -1.125 = 1.142294643 x = 1.142294643 Simplifying x = 1.142294643

Subproblem 2

x + 1.125 = -2.267294643 Simplifying x + 1.125 = -2.267294643 Reorder the terms: 1.125 + x = -2.267294643 Solving 1.125 + x = -2.267294643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.125' to each side of the equation. 1.125 + -1.125 + x = -2.267294643 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = -2.267294643 + -1.125 x = -2.267294643 + -1.125 Combine like terms: -2.267294643 + -1.125 = -3.392294643 x = -3.392294643 Simplifying x = -3.392294643

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.142294643, -3.392294643}

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