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Simplifying 2x2 + 0.6x + -0.9 = 0 Reorder the terms: -0.9 + 0.6x + 2x2 = 0 Solving -0.9 + 0.6x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -0.45 + 0.3x + x2 = 0 Move the constant term to the right: Add '0.45' to each side of the equation. -0.45 + 0.3x + 0.45 + x2 = 0 + 0.45 Reorder the terms: -0.45 + 0.45 + 0.3x + x2 = 0 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + 0.3x + x2 = 0 + 0.45 0.3x + x2 = 0 + 0.45 Combine like terms: 0 + 0.45 = 0.45 0.3x + x2 = 0.45 The x term is 0.3x. Take half its coefficient (0.15). Square it (0.0225) and add it to both sides. Add '0.0225' to each side of the equation. 0.3x + 0.0225 + x2 = 0.45 + 0.0225 Reorder the terms: 0.0225 + 0.3x + x2 = 0.45 + 0.0225 Combine like terms: 0.45 + 0.0225 = 0.4725 0.0225 + 0.3x + x2 = 0.4725 Factor a perfect square on the left side: (x + 0.15)(x + 0.15) = 0.4725 Calculate the square root of the right side: 0.687386354 Break this problem into two subproblems by setting (x + 0.15) equal to 0.687386354 and -0.687386354.Subproblem 1
x + 0.15 = 0.687386354 Simplifying x + 0.15 = 0.687386354 Reorder the terms: 0.15 + x = 0.687386354 Solving 0.15 + x = 0.687386354 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = 0.687386354 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = 0.687386354 + -0.15 x = 0.687386354 + -0.15 Combine like terms: 0.687386354 + -0.15 = 0.537386354 x = 0.537386354 Simplifying x = 0.537386354Subproblem 2
x + 0.15 = -0.687386354 Simplifying x + 0.15 = -0.687386354 Reorder the terms: 0.15 + x = -0.687386354 Solving 0.15 + x = -0.687386354 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.15' to each side of the equation. 0.15 + -0.15 + x = -0.687386354 + -0.15 Combine like terms: 0.15 + -0.15 = 0.00 0.00 + x = -0.687386354 + -0.15 x = -0.687386354 + -0.15 Combine like terms: -0.687386354 + -0.15 = -0.837386354 x = -0.837386354 Simplifying x = -0.837386354Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.537386354, -0.837386354}
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