2x^2-7x=33

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Solution for 2x^2-7x=33 equation:


Simplifying
2x2 + -7x = 33

Reorder the terms:
-7x + 2x2 = 33

Solving
-7x + 2x2 = 33

Solving for variable 'x'.

Reorder the terms:
-33 + -7x + 2x2 = 33 + -33

Combine like terms: 33 + -33 = 0
-33 + -7x + 2x2 = 0

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

Divide each side by '2'.
-16.5 + -3.5x + x2 = 0

Move the constant term to the right:

Add '16.5' to each side of the equation.
-16.5 + -3.5x + 16.5 + x2 = 0 + 16.5

Reorder the terms:
-16.5 + 16.5 + -3.5x + x2 = 0 + 16.5

Combine like terms: -16.5 + 16.5 = 0.0
0.0 + -3.5x + x2 = 0 + 16.5
-3.5x + x2 = 0 + 16.5

Combine like terms: 0 + 16.5 = 16.5
-3.5x + x2 = 16.5

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = 16.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = 16.5 + 3.0625

Combine like terms: 16.5 + 3.0625 = 19.5625
3.0625 + -3.5x + x2 = 19.5625

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = 19.5625

Calculate the square root of the right side: 4.422951503

Break this problem into two subproblems by setting 
(x + -1.75) equal to 4.422951503 and -4.422951503.

Subproblem 1

x + -1.75 = 4.422951503 Simplifying x + -1.75 = 4.422951503 Reorder the terms: -1.75 + x = 4.422951503 Solving -1.75 + x = 4.422951503 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = 4.422951503 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = 4.422951503 + 1.75 x = 4.422951503 + 1.75 Combine like terms: 4.422951503 + 1.75 = 6.172951503 x = 6.172951503 Simplifying x = 6.172951503

Subproblem 2

x + -1.75 = -4.422951503 Simplifying x + -1.75 = -4.422951503 Reorder the terms: -1.75 + x = -4.422951503 Solving -1.75 + x = -4.422951503 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + x = -4.422951503 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + x = -4.422951503 + 1.75 x = -4.422951503 + 1.75 Combine like terms: -4.422951503 + 1.75 = -2.672951503 x = -2.672951503 Simplifying x = -2.672951503

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.172951503, -2.672951503}

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