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Simplifying 5 + -1x(2x + -3) = 12 Reorder the terms: 5 + -1x(-3 + 2x) = 12 5 + (-3 * -1x + 2x * -1x) = 12 5 + (3x + -2x2) = 12 Solving 5 + 3x + -2x2 = 12 Solving for variable 'x'. Reorder the terms: 5 + -12 + 3x + -2x2 = 12 + -12 Combine like terms: 5 + -12 = -7 -7 + 3x + -2x2 = 12 + -12 Combine like terms: 12 + -12 = 0 -7 + 3x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 3.5 + -1.5x + x2 = 0 Move the constant term to the right: Add '-3.5' to each side of the equation. 3.5 + -1.5x + -3.5 + x2 = 0 + -3.5 Reorder the terms: 3.5 + -3.5 + -1.5x + x2 = 0 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + -1.5x + x2 = 0 + -3.5 -1.5x + x2 = 0 + -3.5 Combine like terms: 0 + -3.5 = -3.5 -1.5x + x2 = -3.5 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = -3.5 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = -3.5 + 0.5625 Combine like terms: -3.5 + 0.5625 = -2.9375 0.5625 + -1.5x + x2 = -2.9375 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = -2.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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