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Simplifying x2 + 2x + 3 + 2x2 + 4x + 5 = 0 Reorder the terms: 3 + 5 + 2x + 4x + x2 + 2x2 = 0 Combine like terms: 3 + 5 = 8 8 + 2x + 4x + x2 + 2x2 = 0 Combine like terms: 2x + 4x = 6x 8 + 6x + x2 + 2x2 = 0 Combine like terms: x2 + 2x2 = 3x2 8 + 6x + 3x2 = 0 Solving 8 + 6x + 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'. 2.666666667 + 2x + x2 = 0 Move the constant term to the right: Add '-2.666666667' to each side of the equation. 2.666666667 + 2x + -2.666666667 + x2 = 0 + -2.666666667 Reorder the terms: 2.666666667 + -2.666666667 + 2x + x2 = 0 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + 2x + x2 = 0 + -2.666666667 2x + x2 = 0 + -2.666666667 Combine like terms: 0 + -2.666666667 = -2.666666667 2x + x2 = -2.666666667 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 = -2.666666667 + 1 Reorder the terms: 1 + 2x + x2 = -2.666666667 + 1 Combine like terms: -2.666666667 + 1 = -1.666666667 1 + 2x + x2 = -1.666666667 Factor a perfect square on the left side: (x + 1)(x + 1) = -1.666666667 Can't calculate square root of the right side. The solution to this equation could not be determined.
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