5x^2-20x=62

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Solution for 5x^2-20x=62 equation:


Simplifying
5x2 + -20x = 62

Reorder the terms:
-20x + 5x2 = 62

Solving
-20x + 5x2 = 62

Solving for variable 'x'.

Reorder the terms:
-62 + -20x + 5x2 = 62 + -62

Combine like terms: 62 + -62 = 0
-62 + -20x + 5x2 = 0

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

Divide each side by '5'.
-12.4 + -4x + x2 = 0

Move the constant term to the right:

Add '12.4' to each side of the equation.
-12.4 + -4x + 12.4 + x2 = 0 + 12.4

Reorder the terms:
-12.4 + 12.4 + -4x + x2 = 0 + 12.4

Combine like terms: -12.4 + 12.4 = 0.0
0.0 + -4x + x2 = 0 + 12.4
-4x + x2 = 0 + 12.4

Combine like terms: 0 + 12.4 = 12.4
-4x + x2 = 12.4

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 12.4 + 4

Reorder the terms:
4 + -4x + x2 = 12.4 + 4

Combine like terms: 12.4 + 4 = 16.4
4 + -4x + x2 = 16.4

Factor a perfect square on the left side:
(x + -2)(x + -2) = 16.4

Calculate the square root of the right side: 4.049691346

Break this problem into two subproblems by setting 
(x + -2) equal to 4.049691346 and -4.049691346.

Subproblem 1

x + -2 = 4.049691346 Simplifying x + -2 = 4.049691346 Reorder the terms: -2 + x = 4.049691346 Solving -2 + x = 4.049691346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 4.049691346 + 2 Combine like terms: -2 + 2 = 0 0 + x = 4.049691346 + 2 x = 4.049691346 + 2 Combine like terms: 4.049691346 + 2 = 6.049691346 x = 6.049691346 Simplifying x = 6.049691346

Subproblem 2

x + -2 = -4.049691346 Simplifying x + -2 = -4.049691346 Reorder the terms: -2 + x = -4.049691346 Solving -2 + x = -4.049691346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -4.049691346 + 2 Combine like terms: -2 + 2 = 0 0 + x = -4.049691346 + 2 x = -4.049691346 + 2 Combine like terms: -4.049691346 + 2 = -2.049691346 x = -2.049691346 Simplifying x = -2.049691346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.049691346, -2.049691346}

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