5x^2-16x=48

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Solution for 5x^2-16x=48 equation:


Simplifying
5x2 + -16x = 48

Reorder the terms:
-16x + 5x2 = 48

Solving
-16x + 5x2 = 48

Solving for variable 'x'.

Reorder the terms:
-48 + -16x + 5x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + -16x + 5x2 = 0

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

Divide each side by '5'.
-9.6 + -3.2x + x2 = 0

Move the constant term to the right:

Add '9.6' to each side of the equation.
-9.6 + -3.2x + 9.6 + x2 = 0 + 9.6

Reorder the terms:
-9.6 + 9.6 + -3.2x + x2 = 0 + 9.6

Combine like terms: -9.6 + 9.6 = 0.0
0.0 + -3.2x + x2 = 0 + 9.6
-3.2x + x2 = 0 + 9.6

Combine like terms: 0 + 9.6 = 9.6
-3.2x + x2 = 9.6

The x term is -3.2x.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2x + 2.56 + x2 = 9.6 + 2.56

Reorder the terms:
2.56 + -3.2x + x2 = 9.6 + 2.56

Combine like terms: 9.6 + 2.56 = 12.16
2.56 + -3.2x + x2 = 12.16

Factor a perfect square on the left side:
(x + -1.6)(x + -1.6) = 12.16

Calculate the square root of the right side: 3.487119155

Break this problem into two subproblems by setting 
(x + -1.6) equal to 3.487119155 and -3.487119155.

Subproblem 1

x + -1.6 = 3.487119155 Simplifying x + -1.6 = 3.487119155 Reorder the terms: -1.6 + x = 3.487119155 Solving -1.6 + x = 3.487119155 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = 3.487119155 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = 3.487119155 + 1.6 x = 3.487119155 + 1.6 Combine like terms: 3.487119155 + 1.6 = 5.087119155 x = 5.087119155 Simplifying x = 5.087119155

Subproblem 2

x + -1.6 = -3.487119155 Simplifying x + -1.6 = -3.487119155 Reorder the terms: -1.6 + x = -3.487119155 Solving -1.6 + x = -3.487119155 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = -3.487119155 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = -3.487119155 + 1.6 x = -3.487119155 + 1.6 Combine like terms: -3.487119155 + 1.6 = -1.887119155 x = -1.887119155 Simplifying x = -1.887119155

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.087119155, -1.887119155}

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