0.5b^2-5b=600

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Solution for 0.5b^2-5b=600 equation:


Simplifying
0.5b2 + -5b = 600

Reorder the terms:
-5b + 0.5b2 = 600

Solving
-5b + 0.5b2 = 600

Solving for variable 'b'.

Reorder the terms:
-600 + -5b + 0.5b2 = 600 + -600

Combine like terms: 600 + -600 = 0
-600 + -5b + 0.5b2 = 0

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

Divide each side by '0.5'.
-1200 + -10b + b2 = 0

Move the constant term to the right:

Add '1200' to each side of the equation.
-1200 + -10b + 1200 + b2 = 0 + 1200

Reorder the terms:
-1200 + 1200 + -10b + b2 = 0 + 1200

Combine like terms: -1200 + 1200 = 0
0 + -10b + b2 = 0 + 1200
-10b + b2 = 0 + 1200

Combine like terms: 0 + 1200 = 1200
-10b + b2 = 1200

The b term is -10b.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10b + 25 + b2 = 1200 + 25

Reorder the terms:
25 + -10b + b2 = 1200 + 25

Combine like terms: 1200 + 25 = 1225
25 + -10b + b2 = 1225

Factor a perfect square on the left side:
(b + -5)(b + -5) = 1225

Calculate the square root of the right side: 35

Break this problem into two subproblems by setting 
(b + -5) equal to 35 and -35.

Subproblem 1

b + -5 = 35 Simplifying b + -5 = 35 Reorder the terms: -5 + b = 35 Solving -5 + b = 35 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + b = 35 + 5 Combine like terms: -5 + 5 = 0 0 + b = 35 + 5 b = 35 + 5 Combine like terms: 35 + 5 = 40 b = 40 Simplifying b = 40

Subproblem 2

b + -5 = -35 Simplifying b + -5 = -35 Reorder the terms: -5 + b = -35 Solving -5 + b = -35 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + b = -35 + 5 Combine like terms: -5 + 5 = 0 0 + b = -35 + 5 b = -35 + 5 Combine like terms: -35 + 5 = -30 b = -30 Simplifying b = -30

Solution

The solution to the problem is based on the solutions from the subproblems. b = {40, -30}

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