-1*(18x^2+4x-11)=

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Solution for -1*(18x^2+4x-11)= equation:


Simplifying
-1(18x2 + 4x + -11) = 0

Reorder the terms:
-1(-11 + 4x + 18x2) = 0
(-11 * -1 + 4x * -1 + 18x2 * -1) = 0
(11 + -4x + -18x2) = 0

Solving
11 + -4x + -18x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-18 the coefficient of the squared term: 

Divide each side by '-18'.
-0.6111111111 + 0.2222222222x + x2 = 0

Move the constant term to the right:

Add '0.6111111111' to each side of the equation.
-0.6111111111 + 0.2222222222x + 0.6111111111 + x2 = 0 + 0.6111111111

Reorder the terms:
-0.6111111111 + 0.6111111111 + 0.2222222222x + x2 = 0 + 0.6111111111

Combine like terms: -0.6111111111 + 0.6111111111 = 0.0000000000
0.0000000000 + 0.2222222222x + x2 = 0 + 0.6111111111
0.2222222222x + x2 = 0 + 0.6111111111

Combine like terms: 0 + 0.6111111111 = 0.6111111111
0.2222222222x + x2 = 0.6111111111

The x term is 0.2222222222x.  Take half its coefficient (0.1111111111).
Square it (0.01234567901) and add it to both sides.

Add '0.01234567901' to each side of the equation.
0.2222222222x + 0.01234567901 + x2 = 0.6111111111 + 0.01234567901

Reorder the terms:
0.01234567901 + 0.2222222222x + x2 = 0.6111111111 + 0.01234567901

Combine like terms: 0.6111111111 + 0.01234567901 = 0.62345679011
0.01234567901 + 0.2222222222x + x2 = 0.62345679011

Factor a perfect square on the left side:
(x + 0.1111111111)(x + 0.1111111111) = 0.62345679011

Calculate the square root of the right side: 0.7895928

Break this problem into two subproblems by setting 
(x + 0.1111111111) equal to 0.7895928 and -0.7895928.

Subproblem 1

x + 0.1111111111 = 0.7895928 Simplifying x + 0.1111111111 = 0.7895928 Reorder the terms: 0.1111111111 + x = 0.7895928 Solving 0.1111111111 + x = 0.7895928 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + x = 0.7895928 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = 0.7895928 + -0.1111111111 x = 0.7895928 + -0.1111111111 Combine like terms: 0.7895928 + -0.1111111111 = 0.6784816889 x = 0.6784816889 Simplifying x = 0.6784816889

Subproblem 2

x + 0.1111111111 = -0.7895928 Simplifying x + 0.1111111111 = -0.7895928 Reorder the terms: 0.1111111111 + x = -0.7895928 Solving 0.1111111111 + x = -0.7895928 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + x = -0.7895928 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = -0.7895928 + -0.1111111111 x = -0.7895928 + -0.1111111111 Combine like terms: -0.7895928 + -0.1111111111 = -0.9007039111 x = -0.9007039111 Simplifying x = -0.9007039111

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6784816889, -0.9007039111}

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