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Simplifying (-7y2 + -6y) + (4y2 + y + -1) = 0 Reorder the terms: (-6y + -7y2) + (4y2 + y + -1) = 0 Remove parenthesis around (-6y + -7y2) -6y + -7y2 + (4y2 + y + -1) = 0 Reorder the terms: -6y + -7y2 + (-1 + y + 4y2) = 0 Remove parenthesis around (-1 + y + 4y2) -6y + -7y2 + -1 + y + 4y2 = 0 Reorder the terms: -1 + -6y + y + -7y2 + 4y2 = 0 Combine like terms: -6y + y = -5y -1 + -5y + -7y2 + 4y2 = 0 Combine like terms: -7y2 + 4y2 = -3y2 -1 + -5y + -3y2 = 0 Solving -1 + -5y + -3y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '-1'. -1(1 + 5y + 3y2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(1 + 5y + 3y2)' equal to zero and attempt to solve: Simplifying 1 + 5y + 3y2 = 0 Solving 1 + 5y + 3y2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 0.3333333333 + 1.666666667y + y2 = 0 Move the constant term to the right: Add '-0.3333333333' to each side of the equation. 0.3333333333 + 1.666666667y + -0.3333333333 + y2 = 0 + -0.3333333333 Reorder the terms: 0.3333333333 + -0.3333333333 + 1.666666667y + y2 = 0 + -0.3333333333 Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000 0.0000000000 + 1.666666667y + y2 = 0 + -0.3333333333 1.666666667y + y2 = 0 + -0.3333333333 Combine like terms: 0 + -0.3333333333 = -0.3333333333 1.666666667y + y2 = -0.3333333333 The y term is 1.666666667y. Take half its coefficient (0.8333333335). Square it (0.6944444447) and add it to both sides. Add '0.6944444447' to each side of the equation. 1.666666667y + 0.6944444447 + y2 = -0.3333333333 + 0.6944444447 Reorder the terms: 0.6944444447 + 1.666666667y + y2 = -0.3333333333 + 0.6944444447 Combine like terms: -0.3333333333 + 0.6944444447 = 0.3611111114 0.6944444447 + 1.666666667y + y2 = 0.3611111114 Factor a perfect square on the left side: (y + 0.8333333335)(y + 0.8333333335) = 0.3611111114 Calculate the square root of the right side: 0.600925213 Break this problem into two subproblems by setting (y + 0.8333333335) equal to 0.600925213 and -0.600925213.Subproblem 1
y + 0.8333333335 = 0.600925213 Simplifying y + 0.8333333335 = 0.600925213 Reorder the terms: 0.8333333335 + y = 0.600925213 Solving 0.8333333335 + y = 0.600925213 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + y = 0.600925213 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + y = 0.600925213 + -0.8333333335 y = 0.600925213 + -0.8333333335 Combine like terms: 0.600925213 + -0.8333333335 = -0.2324081205 y = -0.2324081205 Simplifying y = -0.2324081205Subproblem 2
y + 0.8333333335 = -0.600925213 Simplifying y + 0.8333333335 = -0.600925213 Reorder the terms: 0.8333333335 + y = -0.600925213 Solving 0.8333333335 + y = -0.600925213 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + y = -0.600925213 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + y = -0.600925213 + -0.8333333335 y = -0.600925213 + -0.8333333335 Combine like terms: -0.600925213 + -0.8333333335 = -1.4342585465 y = -1.4342585465 Simplifying y = -1.4342585465Solution
The solution to the problem is based on the solutions from the subproblems. y = {-0.2324081205, -1.4342585465}Solution
y = {-0.2324081205, -1.4342585465}
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