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Simplifying y2 + -7y + 4 = 3 Reorder the terms: 4 + -7y + y2 = 3 Solving 4 + -7y + y2 = 3 Solving for variable 'y'. Reorder the terms: 4 + -3 + -7y + y2 = 3 + -3 Combine like terms: 4 + -3 = 1 1 + -7y + y2 = 3 + -3 Combine like terms: 3 + -3 = 0 1 + -7y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -7y + -1 + y2 = 0 + -1 Reorder the terms: 1 + -1 + -7y + y2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -7y + y2 = 0 + -1 -7y + y2 = 0 + -1 Combine like terms: 0 + -1 = -1 -7y + y2 = -1 The y term is -7y. Take half its coefficient (-3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. -7y + 12.25 + y2 = -1 + 12.25 Reorder the terms: 12.25 + -7y + y2 = -1 + 12.25 Combine like terms: -1 + 12.25 = 11.25 12.25 + -7y + y2 = 11.25 Factor a perfect square on the left side: (y + -3.5)(y + -3.5) = 11.25 Calculate the square root of the right side: 3.354101966 Break this problem into two subproblems by setting (y + -3.5) equal to 3.354101966 and -3.354101966.Subproblem 1
y + -3.5 = 3.354101966 Simplifying y + -3.5 = 3.354101966 Reorder the terms: -3.5 + y = 3.354101966 Solving -3.5 + y = 3.354101966 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = 3.354101966 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = 3.354101966 + 3.5 y = 3.354101966 + 3.5 Combine like terms: 3.354101966 + 3.5 = 6.854101966 y = 6.854101966 Simplifying y = 6.854101966Subproblem 2
y + -3.5 = -3.354101966 Simplifying y + -3.5 = -3.354101966 Reorder the terms: -3.5 + y = -3.354101966 Solving -3.5 + y = -3.354101966 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + y = -3.354101966 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + y = -3.354101966 + 3.5 y = -3.354101966 + 3.5 Combine like terms: -3.354101966 + 3.5 = 0.145898034 y = 0.145898034 Simplifying y = 0.145898034Solution
The solution to the problem is based on the solutions from the subproblems. y = {6.854101966, 0.145898034}
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