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Simplifying 13y2 + 13y + -1 = 0 Reorder the terms: -1 + 13y + 13y2 = 0 Solving -1 + 13y + 13y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 13 the coefficient of the squared term: Divide each side by '13'. -0.07692307692 + y + y2 = 0 Move the constant term to the right: Add '0.07692307692' to each side of the equation. -0.07692307692 + y + 0.07692307692 + y2 = 0 + 0.07692307692 Reorder the terms: -0.07692307692 + 0.07692307692 + y + y2 = 0 + 0.07692307692 Combine like terms: -0.07692307692 + 0.07692307692 = 0.00000000000 0.00000000000 + y + y2 = 0 + 0.07692307692 y + y2 = 0 + 0.07692307692 Combine like terms: 0 + 0.07692307692 = 0.07692307692 y + y2 = 0.07692307692 The y term is y. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + y2 = 0.07692307692 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + y2 = 0.07692307692 + 0.25 Combine like terms: 0.07692307692 + 0.25 = 0.32692307692 1.25 + y2 = 0.32692307692 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = 0.32692307692 Calculate the square root of the right side: 0.571771875 Break this problem into two subproblems by setting (y + 0.5) equal to 0.571771875 and -0.571771875.Subproblem 1
y + 0.5 = 0.571771875 Simplifying y + 0.5 = 0.571771875 Reorder the terms: 0.5 + y = 0.571771875 Solving 0.5 + y = 0.571771875 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 0.571771875 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 0.571771875 + -0.5 y = 0.571771875 + -0.5 Combine like terms: 0.571771875 + -0.5 = 0.071771875 y = 0.071771875 Simplifying y = 0.071771875Subproblem 2
y + 0.5 = -0.571771875 Simplifying y + 0.5 = -0.571771875 Reorder the terms: 0.5 + y = -0.571771875 Solving 0.5 + y = -0.571771875 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -0.571771875 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -0.571771875 + -0.5 y = -0.571771875 + -0.5 Combine like terms: -0.571771875 + -0.5 = -1.071771875 y = -1.071771875 Simplifying y = -1.071771875Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.071771875, -1.071771875}
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