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Simplifying 2x(x + 3) = 2x + -1(x + 4) Reorder the terms: 2x(3 + x) = 2x + -1(x + 4) (3 * 2x + x * 2x) = 2x + -1(x + 4) (6x + 2x2) = 2x + -1(x + 4) Reorder the terms: 6x + 2x2 = 2x + -1(4 + x) 6x + 2x2 = 2x + (4 * -1 + x * -1) 6x + 2x2 = 2x + (-4 + -1x) Reorder the terms: 6x + 2x2 = -4 + 2x + -1x Combine like terms: 2x + -1x = 1x 6x + 2x2 = -4 + 1x Solving 6x + 2x2 = -4 + 1x Solving for variable 'x'. Reorder the terms: 4 + 6x + -1x + 2x2 = -4 + 1x + 4 + -1x Combine like terms: 6x + -1x = 5x 4 + 5x + 2x2 = -4 + 1x + 4 + -1x Reorder the terms: 4 + 5x + 2x2 = -4 + 4 + 1x + -1x Combine like terms: -4 + 4 = 0 4 + 5x + 2x2 = 0 + 1x + -1x 4 + 5x + 2x2 = 1x + -1x Combine like terms: 1x + -1x = 0 4 + 5x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 2 + 2.5x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 2.5x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 2.5x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 2.5x + x2 = 0 + -2 2.5x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 2.5x + x2 = -2 The x term is 2.5x. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5x + 1.5625 + x2 = -2 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = -2 + 1.5625 Combine like terms: -2 + 1.5625 = -0.4375 1.5625 + 2.5x + x2 = -0.4375 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = -0.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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