4x^2-10x-33=0

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Solution for 4x^2-10x-33=0 equation:


Simplifying
4x2 + -10x + -33 = 0

Reorder the terms:
-33 + -10x + 4x2 = 0

Solving
-33 + -10x + 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'.
-8.25 + -2.5x + x2 = 0

Move the constant term to the right:

Add '8.25' to each side of the equation.
-8.25 + -2.5x + 8.25 + x2 = 0 + 8.25

Reorder the terms:
-8.25 + 8.25 + -2.5x + x2 = 0 + 8.25

Combine like terms: -8.25 + 8.25 = 0.00
0.00 + -2.5x + x2 = 0 + 8.25
-2.5x + x2 = 0 + 8.25

Combine like terms: 0 + 8.25 = 8.25
-2.5x + x2 = 8.25

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 8.25 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 8.25 + 1.5625

Combine like terms: 8.25 + 1.5625 = 9.8125
1.5625 + -2.5x + x2 = 9.8125

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 9.8125

Calculate the square root of the right side: 3.132491022

Break this problem into two subproblems by setting 
(x + -1.25) equal to 3.132491022 and -3.132491022.

Subproblem 1

x + -1.25 = 3.132491022 Simplifying x + -1.25 = 3.132491022 Reorder the terms: -1.25 + x = 3.132491022 Solving -1.25 + x = 3.132491022 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 3.132491022 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 3.132491022 + 1.25 x = 3.132491022 + 1.25 Combine like terms: 3.132491022 + 1.25 = 4.382491022 x = 4.382491022 Simplifying x = 4.382491022

Subproblem 2

x + -1.25 = -3.132491022 Simplifying x + -1.25 = -3.132491022 Reorder the terms: -1.25 + x = -3.132491022 Solving -1.25 + x = -3.132491022 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -3.132491022 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -3.132491022 + 1.25 x = -3.132491022 + 1.25 Combine like terms: -3.132491022 + 1.25 = -1.882491022 x = -1.882491022 Simplifying x = -1.882491022

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.382491022, -1.882491022}

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