(x+0.2)(x+4.8)=0

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Solution for (x+0.2)(x+4.8)=0 equation:


Simplifying
(x + 0.2)(x + 4.8) = 0

Reorder the terms:
(0.2 + x)(x + 4.8) = 0

Reorder the terms:
(0.2 + x)(4.8 + x) = 0

Multiply (0.2 + x) * (4.8 + x)
(0.2(4.8 + x) + x(4.8 + x)) = 0
((4.8 * 0.2 + x * 0.2) + x(4.8 + x)) = 0
((0.96 + 0.2x) + x(4.8 + x)) = 0
(0.96 + 0.2x + (4.8 * x + x * x)) = 0
(0.96 + 0.2x + (4.8x + x2)) = 0

Combine like terms: 0.2x + 4.8x = 5x
(0.96 + 5x + x2) = 0

Solving
0.96 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.96' to each side of the equation.
0.96 + 5x + -0.96 + x2 = 0 + -0.96

Reorder the terms:
0.96 + -0.96 + 5x + x2 = 0 + -0.96

Combine like terms: 0.96 + -0.96 = 0.00
0.00 + 5x + x2 = 0 + -0.96
5x + x2 = 0 + -0.96

Combine like terms: 0 + -0.96 = -0.96
5x + x2 = -0.96

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -0.96 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -0.96 + 6.25

Combine like terms: -0.96 + 6.25 = 5.29
6.25 + 5x + x2 = 5.29

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 5.29

Calculate the square root of the right side: 2.3

Break this problem into two subproblems by setting 
(x + 2.5) equal to 2.3 and -2.3.

Subproblem 1

x + 2.5 = 2.3 Simplifying x + 2.5 = 2.3 Reorder the terms: 2.5 + x = 2.3 Solving 2.5 + x = 2.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 2.3 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 2.3 + -2.5 x = 2.3 + -2.5 Combine like terms: 2.3 + -2.5 = -0.2 x = -0.2 Simplifying x = -0.2

Subproblem 2

x + 2.5 = -2.3 Simplifying x + 2.5 = -2.3 Reorder the terms: 2.5 + x = -2.3 Solving 2.5 + x = -2.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -2.3 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -2.3 + -2.5 x = -2.3 + -2.5 Combine like terms: -2.3 + -2.5 = -4.8 x = -4.8 Simplifying x = -4.8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.2, -4.8}

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