4.8x^2-21.6x+9.6=0

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Solution for 4.8x^2-21.6x+9.6=0 equation:


Simplifying
4.8x2 + -21.6x + 9.6 = 0

Reorder the terms:
9.6 + -21.6x + 4.8x2 = 0

Solving
9.6 + -21.6x + 4.8x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.8'.
2 + -4.5x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -4.5x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -4.5x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -4.5x + x2 = 0 + -2
-4.5x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-4.5x + x2 = -2

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 = -2 + 5.0625

Reorder the terms:
5.0625 + -4.5x + x2 = -2 + 5.0625

Combine like terms: -2 + 5.0625 = 3.0625
5.0625 + -4.5x + x2 = 3.0625

Factor a perfect square on the left side:
(x + -2.25)(x + -2.25) = 3.0625

Calculate the square root of the right side: 1.75

Break this problem into two subproblems by setting 
(x + -2.25) equal to 1.75 and -1.75.

Subproblem 1

x + -2.25 = 1.75 Simplifying x + -2.25 = 1.75 Reorder the terms: -2.25 + x = 1.75 Solving -2.25 + x = 1.75 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 = 1.75 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 1.75 + 2.25 x = 1.75 + 2.25 Combine like terms: 1.75 + 2.25 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -2.25 = -1.75 Simplifying x + -2.25 = -1.75 Reorder the terms: -2.25 + x = -1.75 Solving -2.25 + x = -1.75 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 = -1.75 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -1.75 + 2.25 x = -1.75 + 2.25 Combine like terms: -1.75 + 2.25 = 0.5 x = 0.5 Simplifying x = 0.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, 0.5}

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