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Simplifying 3y2 + -4y + 15 = 0 Reorder the terms: 15 + -4y + 3y2 = 0 Solving 15 + -4y + 3y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 5 + -1.333333333y + y2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -1.333333333y + -5 + y2 = 0 + -5 Reorder the terms: 5 + -5 + -1.333333333y + y2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1.333333333y + y2 = 0 + -5 -1.333333333y + y2 = 0 + -5 Combine like terms: 0 + -5 = -5 -1.333333333y + y2 = -5 The y term is -1.333333333y. Take half its coefficient (-0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. -1.333333333y + 0.4444444442 + y2 = -5 + 0.4444444442 Reorder the terms: 0.4444444442 + -1.333333333y + y2 = -5 + 0.4444444442 Combine like terms: -5 + 0.4444444442 = -4.5555555558 0.4444444442 + -1.333333333y + y2 = -4.5555555558 Factor a perfect square on the left side: (y + -0.6666666665)(y + -0.6666666665) = -4.5555555558 Can't calculate square root of the right side. The solution to this equation could not be determined.
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