36x^2-25x-16=0

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Solution for 36x^2-25x-16=0 equation:


Simplifying
36x2 + -25x + -16 = 0

Reorder the terms:
-16 + -25x + 36x2 = 0

Solving
-16 + -25x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-0.4444444444 + -0.6944444444x + x2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -0.6944444444x + 0.4444444444 + x2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -0.6944444444x + x2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -0.6944444444x + x2 = 0 + 0.4444444444
-0.6944444444x + x2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-0.6944444444x + x2 = 0.4444444444

The x term is -0.6944444444x.  Take half its coefficient (-0.3472222222).
Square it (0.1205632716) and add it to both sides.

Add '0.1205632716' to each side of the equation.
-0.6944444444x + 0.1205632716 + x2 = 0.4444444444 + 0.1205632716

Reorder the terms:
0.1205632716 + -0.6944444444x + x2 = 0.4444444444 + 0.1205632716

Combine like terms: 0.4444444444 + 0.1205632716 = 0.565007716
0.1205632716 + -0.6944444444x + x2 = 0.565007716

Factor a perfect square on the left side:
(x + -0.3472222222)(x + -0.3472222222) = 0.565007716

Calculate the square root of the right side: 0.751669952

Break this problem into two subproblems by setting 
(x + -0.3472222222) equal to 0.751669952 and -0.751669952.

Subproblem 1

x + -0.3472222222 = 0.751669952 Simplifying x + -0.3472222222 = 0.751669952 Reorder the terms: -0.3472222222 + x = 0.751669952 Solving -0.3472222222 + x = 0.751669952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3472222222' to each side of the equation. -0.3472222222 + 0.3472222222 + x = 0.751669952 + 0.3472222222 Combine like terms: -0.3472222222 + 0.3472222222 = 0.0000000000 0.0000000000 + x = 0.751669952 + 0.3472222222 x = 0.751669952 + 0.3472222222 Combine like terms: 0.751669952 + 0.3472222222 = 1.0988921742 x = 1.0988921742 Simplifying x = 1.0988921742

Subproblem 2

x + -0.3472222222 = -0.751669952 Simplifying x + -0.3472222222 = -0.751669952 Reorder the terms: -0.3472222222 + x = -0.751669952 Solving -0.3472222222 + x = -0.751669952 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3472222222' to each side of the equation. -0.3472222222 + 0.3472222222 + x = -0.751669952 + 0.3472222222 Combine like terms: -0.3472222222 + 0.3472222222 = 0.0000000000 0.0000000000 + x = -0.751669952 + 0.3472222222 x = -0.751669952 + 0.3472222222 Combine like terms: -0.751669952 + 0.3472222222 = -0.4044477298 x = -0.4044477298 Simplifying x = -0.4044477298

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0988921742, -0.4044477298}

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