(5+0.50x)(300-20x)=1562.50

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Solution for (5+0.50x)(300-20x)=1562.50 equation:


Simplifying
(5 + 0.50x)(300 + -20x) = 1562.50

Multiply (5 + 0.50x) * (300 + -20x)
(5(300 + -20x) + 0.50x * (300 + -20x)) = 1562.50
((300 * 5 + -20x * 5) + 0.50x * (300 + -20x)) = 1562.50
((1500 + -100x) + 0.50x * (300 + -20x)) = 1562.50
(1500 + -100x + (300 * 0.50x + -20x * 0.50x)) = 1562.50
(1500 + -100x + (150x + -10x2)) = 1562.50

Combine like terms: -100x + 150x = 50x
(1500 + 50x + -10x2) = 1562.50

Solving
1500 + 50x + -10x2 = 1562.50

Solving for variable 'x'.

Reorder the terms:
1500 + -1562.50 + 50x + -10x2 = 1562.50 + -1562.50

Combine like terms: 1500 + -1562.50 = -62.5
-62.5 + 50x + -10x2 = 1562.50 + -1562.50

Combine like terms: 1562.50 + -1562.50 = 0.00
-62.5 + 50x + -10x2 = 0.00

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
6.25 + -5x + x2 = 0.000

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -5x + -6.25 + x2 = 0.000 + -6.25

Reorder the terms:
6.25 + -6.25 + -5x + x2 = 0.000 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -5x + x2 = 0.000 + -6.25
-5x + x2 = 0.000 + -6.25

Combine like terms: 0.000 + -6.25 = -6.25
-5x + x2 = -6.25

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 = -6.25 + 6.25

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

Combine like terms: -6.25 + 6.25 = 0.00
6.25 + -5x + x2 = 0.00

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(x + -2.5) equal to 0.00 and 0.00.

Subproblem 1

x + -2.5 = 0.00 Simplifying x + -2.5 = 0.00 Reorder the terms: -2.5 + x = 0.00 Solving -2.5 + x = 0.00 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 = 0.00 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 0.00 + 2.5 x = 0.00 + 2.5 Combine like terms: 0.00 + 2.5 = 2.5 x = 2.5 Simplifying x = 2.5

Subproblem 2

x + -2.5 = 0.00 Simplifying x + -2.5 = 0.00 Reorder the terms: -2.5 + x = 0.00 Solving -2.5 + x = 0.00 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 = 0.00 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 0.00 + 2.5 x = 0.00 + 2.5 Combine like terms: 0.00 + 2.5 = 2.5 x = 2.5 Simplifying x = 2.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.5, 2.5}

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