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Simplifying 4x2 + -12x + 9 = 5x + 2 Reorder the terms: 9 + -12x + 4x2 = 5x + 2 Reorder the terms: 9 + -12x + 4x2 = 2 + 5x Solving 9 + -12x + 4x2 = 2 + 5x Solving for variable 'x'. Reorder the terms: 9 + -2 + -12x + -5x + 4x2 = 2 + 5x + -2 + -5x Combine like terms: 9 + -2 = 7 7 + -12x + -5x + 4x2 = 2 + 5x + -2 + -5x Combine like terms: -12x + -5x = -17x 7 + -17x + 4x2 = 2 + 5x + -2 + -5x Reorder the terms: 7 + -17x + 4x2 = 2 + -2 + 5x + -5x Combine like terms: 2 + -2 = 0 7 + -17x + 4x2 = 0 + 5x + -5x 7 + -17x + 4x2 = 5x + -5x Combine like terms: 5x + -5x = 0 7 + -17x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 1.75 + -4.25x + x2 = 0 Move the constant term to the right: Add '-1.75' to each side of the equation. 1.75 + -4.25x + -1.75 + x2 = 0 + -1.75 Reorder the terms: 1.75 + -1.75 + -4.25x + x2 = 0 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + -4.25x + x2 = 0 + -1.75 -4.25x + x2 = 0 + -1.75 Combine like terms: 0 + -1.75 = -1.75 -4.25x + x2 = -1.75 The x term is -4.25x. Take half its coefficient (-2.125). Square it (4.515625) and add it to both sides. Add '4.515625' to each side of the equation. -4.25x + 4.515625 + x2 = -1.75 + 4.515625 Reorder the terms: 4.515625 + -4.25x + x2 = -1.75 + 4.515625 Combine like terms: -1.75 + 4.515625 = 2.765625 4.515625 + -4.25x + x2 = 2.765625 Factor a perfect square on the left side: (x + -2.125)(x + -2.125) = 2.765625 Calculate the square root of the right side: 1.663016837 Break this problem into two subproblems by setting (x + -2.125) equal to 1.663016837 and -1.663016837.Subproblem 1
x + -2.125 = 1.663016837 Simplifying x + -2.125 = 1.663016837 Reorder the terms: -2.125 + x = 1.663016837 Solving -2.125 + x = 1.663016837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = 1.663016837 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = 1.663016837 + 2.125 x = 1.663016837 + 2.125 Combine like terms: 1.663016837 + 2.125 = 3.788016837 x = 3.788016837 Simplifying x = 3.788016837Subproblem 2
x + -2.125 = -1.663016837 Simplifying x + -2.125 = -1.663016837 Reorder the terms: -2.125 + x = -1.663016837 Solving -2.125 + x = -1.663016837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = -1.663016837 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = -1.663016837 + 2.125 x = -1.663016837 + 2.125 Combine like terms: -1.663016837 + 2.125 = 0.461983163 x = 0.461983163 Simplifying x = 0.461983163Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.788016837, 0.461983163}
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