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Simplifying 4y2 + -12y + 42 = 0 Reorder the terms: 42 + -12y + 4y2 = 0 Solving 42 + -12y + 4y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '2'. 2(21 + -6y + 2y2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(21 + -6y + 2y2)' equal to zero and attempt to solve: Simplifying 21 + -6y + 2y2 = 0 Solving 21 + -6y + 2y2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 10.5 + -3y + y2 = 0 Move the constant term to the right: Add '-10.5' to each side of the equation. 10.5 + -3y + -10.5 + y2 = 0 + -10.5 Reorder the terms: 10.5 + -10.5 + -3y + y2 = 0 + -10.5 Combine like terms: 10.5 + -10.5 = 0.0 0.0 + -3y + y2 = 0 + -10.5 -3y + y2 = 0 + -10.5 Combine like terms: 0 + -10.5 = -10.5 -3y + y2 = -10.5 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 = -10.5 + 2.25 Reorder the terms: 2.25 + -3y + y2 = -10.5 + 2.25 Combine like terms: -10.5 + 2.25 = -8.25 2.25 + -3y + y2 = -8.25 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = -8.25 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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