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Simplifying 3(x + -4) = x2 Reorder the terms: 3(-4 + x) = x2 (-4 * 3 + x * 3) = x2 (-12 + 3x) = x2 Solving -12 + 3x = x2 Solving for variable 'x'. Combine like terms: x2 + -1x2 = 0 -12 + 3x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 12 + -3x + x2 = 0 Move the constant term to the right: Add '-12' to each side of the equation. 12 + -3x + -12 + x2 = 0 + -12 Reorder the terms: 12 + -12 + -3x + x2 = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -3x + x2 = 0 + -12 -3x + x2 = 0 + -12 Combine like terms: 0 + -12 = -12 -3x + x2 = -12 The x term is -3x. 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. -3x + 2.25 + x2 = -12 + 2.25 Reorder the terms: 2.25 + -3x + x2 = -12 + 2.25 Combine like terms: -12 + 2.25 = -9.75 2.25 + -3x + x2 = -9.75 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = -9.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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