2x^2-9x=62

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Solution for 2x^2-9x=62 equation:


Simplifying
2x2 + -9x = 62

Reorder the terms:
-9x + 2x2 = 62

Solving
-9x + 2x2 = 62

Solving for variable 'x'.

Reorder the terms:
-62 + -9x + 2x2 = 62 + -62

Combine like terms: 62 + -62 = 0
-62 + -9x + 2x2 = 0

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

Divide each side by '2'.
-31 + -4.5x + x2 = 0

Move the constant term to the right:

Add '31' to each side of the equation.
-31 + -4.5x + 31 + x2 = 0 + 31

Reorder the terms:
-31 + 31 + -4.5x + x2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + -4.5x + x2 = 0 + 31
-4.5x + x2 = 0 + 31

Combine like terms: 0 + 31 = 31
-4.5x + x2 = 31

The x term is -4.5x.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5x + 5.0625 + x2 = 31 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = 31 + 5.0625

Combine like terms: 31 + 5.0625 = 36.0625
5.0625 + -4.5x + x2 = 36.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 36.0625

Calculate the square root of the right side: 6.005206075

Break this problem into two subproblems by setting 
(x + -2.25) equal to 6.005206075 and -6.005206075.

Subproblem 1

x + -2.25 = 6.005206075 Simplifying x + -2.25 = 6.005206075 Reorder the terms: -2.25 + x = 6.005206075 Solving -2.25 + x = 6.005206075 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 6.005206075 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 6.005206075 + 2.25 x = 6.005206075 + 2.25 Combine like terms: 6.005206075 + 2.25 = 8.255206075 x = 8.255206075 Simplifying x = 8.255206075

Subproblem 2

x + -2.25 = -6.005206075 Simplifying x + -2.25 = -6.005206075 Reorder the terms: -2.25 + x = -6.005206075 Solving -2.25 + x = -6.005206075 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -6.005206075 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -6.005206075 + 2.25 x = -6.005206075 + 2.25 Combine like terms: -6.005206075 + 2.25 = -3.755206075 x = -3.755206075 Simplifying x = -3.755206075

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.255206075, -3.755206075}

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