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Simplifying 3x2 + 17x + 90 = 0 Reorder the terms: 90 + 17x + 3x2 = 0 Solving 90 + 17x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 30 + 5.666666667x + x2 = 0 Move the constant term to the right: Add '-30' to each side of the equation. 30 + 5.666666667x + -30 + x2 = 0 + -30 Reorder the terms: 30 + -30 + 5.666666667x + x2 = 0 + -30 Combine like terms: 30 + -30 = 0 0 + 5.666666667x + x2 = 0 + -30 5.666666667x + x2 = 0 + -30 Combine like terms: 0 + -30 = -30 5.666666667x + x2 = -30 The x term is 5.666666667x. Take half its coefficient (2.833333334). Square it (8.027777782) and add it to both sides. Add '8.027777782' to each side of the equation. 5.666666667x + 8.027777782 + x2 = -30 + 8.027777782 Reorder the terms: 8.027777782 + 5.666666667x + x2 = -30 + 8.027777782 Combine like terms: -30 + 8.027777782 = -21.972222218 8.027777782 + 5.666666667x + x2 = -21.972222218 Factor a perfect square on the left side: (x + 2.833333334)(x + 2.833333334) = -21.972222218 Can't calculate square root of the right side. The solution to this equation could not be determined.
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