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Simplifying y2 + 6y + 7 = 0 Reorder the terms: 7 + 6y + y2 = 0 Solving 7 + 6y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-7' to each side of the equation. 7 + 6y + -7 + y2 = 0 + -7 Reorder the terms: 7 + -7 + 6y + y2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 6y + y2 = 0 + -7 6y + y2 = 0 + -7 Combine like terms: 0 + -7 = -7 6y + y2 = -7 The y term is 6y. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6y + 9 + y2 = -7 + 9 Reorder the terms: 9 + 6y + y2 = -7 + 9 Combine like terms: -7 + 9 = 2 9 + 6y + y2 = 2 Factor a perfect square on the left side: (y + 3)(y + 3) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (y + 3) equal to 1.414213562 and -1.414213562.Subproblem 1
y + 3 = 1.414213562 Simplifying y + 3 = 1.414213562 Reorder the terms: 3 + y = 1.414213562 Solving 3 + y = 1.414213562 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = 1.414213562 + -3 Combine like terms: 3 + -3 = 0 0 + y = 1.414213562 + -3 y = 1.414213562 + -3 Combine like terms: 1.414213562 + -3 = -1.585786438 y = -1.585786438 Simplifying y = -1.585786438Subproblem 2
y + 3 = -1.414213562 Simplifying y + 3 = -1.414213562 Reorder the terms: 3 + y = -1.414213562 Solving 3 + y = -1.414213562 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + y = -1.414213562 + -3 Combine like terms: 3 + -3 = 0 0 + y = -1.414213562 + -3 y = -1.414213562 + -3 Combine like terms: -1.414213562 + -3 = -4.414213562 y = -4.414213562 Simplifying y = -4.414213562Solution
The solution to the problem is based on the solutions from the subproblems. y = {-1.585786438, -4.414213562}
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