2x^2-3x=43

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Solution for 2x^2-3x=43 equation:


Simplifying
2x2 + -3x = 43

Reorder the terms:
-3x + 2x2 = 43

Solving
-3x + 2x2 = 43

Solving for variable 'x'.

Reorder the terms:
-43 + -3x + 2x2 = 43 + -43

Combine like terms: 43 + -43 = 0
-43 + -3x + 2x2 = 0

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

Divide each side by '2'.
-21.5 + -1.5x + x2 = 0

Move the constant term to the right:

Add '21.5' to each side of the equation.
-21.5 + -1.5x + 21.5 + x2 = 0 + 21.5

Reorder the terms:
-21.5 + 21.5 + -1.5x + x2 = 0 + 21.5

Combine like terms: -21.5 + 21.5 = 0.0
0.0 + -1.5x + x2 = 0 + 21.5
-1.5x + x2 = 0 + 21.5

Combine like terms: 0 + 21.5 = 21.5
-1.5x + x2 = 21.5

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 21.5 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 21.5 + 0.5625

Combine like terms: 21.5 + 0.5625 = 22.0625
0.5625 + -1.5x + x2 = 22.0625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 22.0625

Calculate the square root of the right side: 4.697073557

Break this problem into two subproblems by setting 
(x + -0.75) equal to 4.697073557 and -4.697073557.

Subproblem 1

x + -0.75 = 4.697073557 Simplifying x + -0.75 = 4.697073557 Reorder the terms: -0.75 + x = 4.697073557 Solving -0.75 + x = 4.697073557 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 4.697073557 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 4.697073557 + 0.75 x = 4.697073557 + 0.75 Combine like terms: 4.697073557 + 0.75 = 5.447073557 x = 5.447073557 Simplifying x = 5.447073557

Subproblem 2

x + -0.75 = -4.697073557 Simplifying x + -0.75 = -4.697073557 Reorder the terms: -0.75 + x = -4.697073557 Solving -0.75 + x = -4.697073557 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -4.697073557 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -4.697073557 + 0.75 x = -4.697073557 + 0.75 Combine like terms: -4.697073557 + 0.75 = -3.947073557 x = -3.947073557 Simplifying x = -3.947073557

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.447073557, -3.947073557}

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