0=-200r^2+92000r-8400000

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Solution for 0=-200r^2+92000r-8400000 equation:


Simplifying
0 = -200r2 + 92000r + -8400000

Reorder the terms:
0 = -8400000 + 92000r + -200r2

Solving
0 = -8400000 + 92000r + -200r2

Solving for variable 'r'.

Combine like terms: 0 + 8400000 = 8400000
8400000 + -92000r + 200r2 = -8400000 + 92000r + -200r2 + 8400000 + -92000r + 200r2

Reorder the terms:
8400000 + -92000r + 200r2 = -8400000 + 8400000 + 92000r + -92000r + -200r2 + 200r2

Combine like terms: -8400000 + 8400000 = 0
8400000 + -92000r + 200r2 = 0 + 92000r + -92000r + -200r2 + 200r2
8400000 + -92000r + 200r2 = 92000r + -92000r + -200r2 + 200r2

Combine like terms: 92000r + -92000r = 0
8400000 + -92000r + 200r2 = 0 + -200r2 + 200r2
8400000 + -92000r + 200r2 = -200r2 + 200r2

Combine like terms: -200r2 + 200r2 = 0
8400000 + -92000r + 200r2 = 0

Factor out the Greatest Common Factor (GCF), '200'.
200(42000 + -460r + r2) = 0

Ignore the factor 200.

Subproblem 1

Set the factor '(42000 + -460r + r2)' equal to zero and attempt to solve: Simplifying 42000 + -460r + r2 = 0 Solving 42000 + -460r + r2 = 0 Begin completing the square. Move the constant term to the right: Add '-42000' to each side of the equation. 42000 + -460r + -42000 + r2 = 0 + -42000 Reorder the terms: 42000 + -42000 + -460r + r2 = 0 + -42000 Combine like terms: 42000 + -42000 = 0 0 + -460r + r2 = 0 + -42000 -460r + r2 = 0 + -42000 Combine like terms: 0 + -42000 = -42000 -460r + r2 = -42000 The r term is -460r. Take half its coefficient (-230). Square it (52900) and add it to both sides. Add '52900' to each side of the equation. -460r + 52900 + r2 = -42000 + 52900 Reorder the terms: 52900 + -460r + r2 = -42000 + 52900 Combine like terms: -42000 + 52900 = 10900 52900 + -460r + r2 = 10900 Factor a perfect square on the left side: (r + -230)(r + -230) = 10900 Calculate the square root of the right side: 104.403065089 Break this problem into two subproblems by setting (r + -230) equal to 104.403065089 and -104.403065089.

Subproblem 1

r + -230 = 104.403065089 Simplifying r + -230 = 104.403065089 Reorder the terms: -230 + r = 104.403065089 Solving -230 + r = 104.403065089 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '230' to each side of the equation. -230 + 230 + r = 104.403065089 + 230 Combine like terms: -230 + 230 = 0 0 + r = 104.403065089 + 230 r = 104.403065089 + 230 Combine like terms: 104.403065089 + 230 = 334.403065089 r = 334.403065089 Simplifying r = 334.403065089

Subproblem 2

r + -230 = -104.403065089 Simplifying r + -230 = -104.403065089 Reorder the terms: -230 + r = -104.403065089 Solving -230 + r = -104.403065089 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '230' to each side of the equation. -230 + 230 + r = -104.403065089 + 230 Combine like terms: -230 + 230 = 0 0 + r = -104.403065089 + 230 r = -104.403065089 + 230 Combine like terms: -104.403065089 + 230 = 125.596934911 r = 125.596934911 Simplifying r = 125.596934911

Solution

The solution to the problem is based on the solutions from the subproblems. r = {334.403065089, 125.596934911}

Solution

r = {334.403065089, 125.596934911}

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