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Simplifying 3x2 + -6x + 16 = 9 Reorder the terms: 16 + -6x + 3x2 = 9 Solving 16 + -6x + 3x2 = 9 Solving for variable 'x'. Reorder the terms: 16 + -9 + -6x + 3x2 = 9 + -9 Combine like terms: 16 + -9 = 7 7 + -6x + 3x2 = 9 + -9 Combine like terms: 9 + -9 = 0 7 + -6x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 2.333333333 + -2x + x2 = 0 Move the constant term to the right: Add '-2.333333333' to each side of the equation. 2.333333333 + -2x + -2.333333333 + x2 = 0 + -2.333333333 Reorder the terms: 2.333333333 + -2.333333333 + -2x + x2 = 0 + -2.333333333 Combine like terms: 2.333333333 + -2.333333333 = 0.000000000 0.000000000 + -2x + x2 = 0 + -2.333333333 -2x + x2 = 0 + -2.333333333 Combine like terms: 0 + -2.333333333 = -2.333333333 -2x + x2 = -2.333333333 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -2.333333333 + 1 Reorder the terms: 1 + -2x + x2 = -2.333333333 + 1 Combine like terms: -2.333333333 + 1 = -1.333333333 1 + -2x + x2 = -1.333333333 Factor a perfect square on the left side: (x + -1)(x + -1) = -1.333333333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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