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Simplifying 9 = 2X2 + -2X Reorder the terms: 9 = -2X + 2X2 Solving 9 = -2X + 2X2 Solving for variable 'X'. Reorder the terms: 9 + 2X + -2X2 = -2X + 2X + 2X2 + -2X2 Combine like terms: -2X + 2X = 0 9 + 2X + -2X2 = 0 + 2X2 + -2X2 9 + 2X + -2X2 = 2X2 + -2X2 Combine like terms: 2X2 + -2X2 = 0 9 + 2X + -2X2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -4.5 + -1X + X2 = 0 Move the constant term to the right: Add '4.5' to each side of the equation. -4.5 + -1X + 4.5 + X2 = 0 + 4.5 Reorder the terms: -4.5 + 4.5 + -1X + X2 = 0 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + -1X + X2 = 0 + 4.5 -1X + X2 = 0 + 4.5 Combine like terms: 0 + 4.5 = 4.5 -1X + X2 = 4.5 The X term is -1X. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1X + 0.25 + X2 = 4.5 + 0.25 Reorder the terms: 0.25 + -1X + X2 = 4.5 + 0.25 Combine like terms: 4.5 + 0.25 = 4.75 0.25 + -1X + X2 = 4.75 Factor a perfect square on the left side: (X + -0.5)(X + -0.5) = 4.75 Calculate the square root of the right side: 2.179449472 Break this problem into two subproblems by setting (X + -0.5) equal to 2.179449472 and -2.179449472.Subproblem 1
X + -0.5 = 2.179449472 Simplifying X + -0.5 = 2.179449472 Reorder the terms: -0.5 + X = 2.179449472 Solving -0.5 + X = 2.179449472 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + X = 2.179449472 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + X = 2.179449472 + 0.5 X = 2.179449472 + 0.5 Combine like terms: 2.179449472 + 0.5 = 2.679449472 X = 2.679449472 Simplifying X = 2.679449472Subproblem 2
X + -0.5 = -2.179449472 Simplifying X + -0.5 = -2.179449472 Reorder the terms: -0.5 + X = -2.179449472 Solving -0.5 + X = -2.179449472 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + X = -2.179449472 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + X = -2.179449472 + 0.5 X = -2.179449472 + 0.5 Combine like terms: -2.179449472 + 0.5 = -1.679449472 X = -1.679449472 Simplifying X = -1.679449472Solution
The solution to the problem is based on the solutions from the subproblems. X = {2.679449472, -1.679449472}
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