(50-y)*y=10

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Solution for (50-y)*y=10 equation:


Simplifying
(50 + -1y) * y = 10

Reorder the terms for easier multiplication:
y(50 + -1y) = 10
(50 * y + -1y * y) = 10
(50y + -1y2) = 10

Solving
50y + -1y2 = 10

Solving for variable 'y'.

Reorder the terms:
-10 + 50y + -1y2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 50y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
10 + -50y + y2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -50y + -10 + y2 = 0 + -10

Reorder the terms:
10 + -10 + -50y + y2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -50y + y2 = 0 + -10
-50y + y2 = 0 + -10

Combine like terms: 0 + -10 = -10
-50y + y2 = -10

The y term is -50y.  Take half its coefficient (-25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
-50y + 625 + y2 = -10 + 625

Reorder the terms:
625 + -50y + y2 = -10 + 625

Combine like terms: -10 + 625 = 615
625 + -50y + y2 = 615

Factor a perfect square on the left side:
(y + -25)(y + -25) = 615

Calculate the square root of the right side: 24.799193535

Break this problem into two subproblems by setting 
(y + -25) equal to 24.799193535 and -24.799193535.

Subproblem 1

y + -25 = 24.799193535 Simplifying y + -25 = 24.799193535 Reorder the terms: -25 + y = 24.799193535 Solving -25 + y = 24.799193535 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + y = 24.799193535 + 25 Combine like terms: -25 + 25 = 0 0 + y = 24.799193535 + 25 y = 24.799193535 + 25 Combine like terms: 24.799193535 + 25 = 49.799193535 y = 49.799193535 Simplifying y = 49.799193535

Subproblem 2

y + -25 = -24.799193535 Simplifying y + -25 = -24.799193535 Reorder the terms: -25 + y = -24.799193535 Solving -25 + y = -24.799193535 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + y = -24.799193535 + 25 Combine like terms: -25 + 25 = 0 0 + y = -24.799193535 + 25 y = -24.799193535 + 25 Combine like terms: -24.799193535 + 25 = 0.200806465 y = 0.200806465 Simplifying y = 0.200806465

Solution

The solution to the problem is based on the solutions from the subproblems. y = {49.799193535, 0.200806465}

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