5y^2-15y=25

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Solution for 5y^2-15y=25 equation:


Simplifying
5y2 + -15y = 25

Reorder the terms:
-15y + 5y2 = 25

Solving
-15y + 5y2 = 25

Solving for variable 'y'.

Reorder the terms:
-25 + -15y + 5y2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + -15y + 5y2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-5 + -3y + y2) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-5 + -3y + y2)' equal to zero and attempt to solve: Simplifying -5 + -3y + y2 = 0 Solving -5 + -3y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -3y + 5 + y2 = 0 + 5 Reorder the terms: -5 + 5 + -3y + y2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -3y + y2 = 0 + 5 -3y + y2 = 0 + 5 Combine like terms: 0 + 5 = 5 -3y + y2 = 5 The y term is -3y. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3y + 2.25 + y2 = 5 + 2.25 Reorder the terms: 2.25 + -3y + y2 = 5 + 2.25 Combine like terms: 5 + 2.25 = 7.25 2.25 + -3y + y2 = 7.25 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = 7.25 Calculate the square root of the right side: 2.692582404 Break this problem into two subproblems by setting (y + -1.5) equal to 2.692582404 and -2.692582404.

Subproblem 1

y + -1.5 = 2.692582404 Simplifying y + -1.5 = 2.692582404 Reorder the terms: -1.5 + y = 2.692582404 Solving -1.5 + y = 2.692582404 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = 2.692582404 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = 2.692582404 + 1.5 y = 2.692582404 + 1.5 Combine like terms: 2.692582404 + 1.5 = 4.192582404 y = 4.192582404 Simplifying y = 4.192582404

Subproblem 2

y + -1.5 = -2.692582404 Simplifying y + -1.5 = -2.692582404 Reorder the terms: -1.5 + y = -2.692582404 Solving -1.5 + y = -2.692582404 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = -2.692582404 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = -2.692582404 + 1.5 y = -2.692582404 + 1.5 Combine like terms: -2.692582404 + 1.5 = -1.192582404 y = -1.192582404 Simplifying y = -1.192582404

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.192582404, -1.192582404}

Solution

y = {4.192582404, -1.192582404}

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