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Simplifying 4x2 + -2x + -9 = 7x + 8 Reorder the terms: -9 + -2x + 4x2 = 7x + 8 Reorder the terms: -9 + -2x + 4x2 = 8 + 7x Solving -9 + -2x + 4x2 = 8 + 7x Solving for variable 'x'. Reorder the terms: -9 + -8 + -2x + -7x + 4x2 = 8 + 7x + -8 + -7x Combine like terms: -9 + -8 = -17 -17 + -2x + -7x + 4x2 = 8 + 7x + -8 + -7x Combine like terms: -2x + -7x = -9x -17 + -9x + 4x2 = 8 + 7x + -8 + -7x Reorder the terms: -17 + -9x + 4x2 = 8 + -8 + 7x + -7x Combine like terms: 8 + -8 = 0 -17 + -9x + 4x2 = 0 + 7x + -7x -17 + -9x + 4x2 = 7x + -7x Combine like terms: 7x + -7x = 0 -17 + -9x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -4.25 + -2.25x + x2 = 0 Move the constant term to the right: Add '4.25' to each side of the equation. -4.25 + -2.25x + 4.25 + x2 = 0 + 4.25 Reorder the terms: -4.25 + 4.25 + -2.25x + x2 = 0 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + -2.25x + x2 = 0 + 4.25 -2.25x + x2 = 0 + 4.25 Combine like terms: 0 + 4.25 = 4.25 -2.25x + x2 = 4.25 The x term is -2.25x. Take half its coefficient (-1.125). Square it (1.265625) and add it to both sides. Add '1.265625' to each side of the equation. -2.25x + 1.265625 + x2 = 4.25 + 1.265625 Reorder the terms: 1.265625 + -2.25x + x2 = 4.25 + 1.265625 Combine like terms: 4.25 + 1.265625 = 5.515625 1.265625 + -2.25x + x2 = 5.515625 Factor a perfect square on the left side: (x + -1.125)(x + -1.125) = 5.515625 Calculate the square root of the right side: 2.348536779 Break this problem into two subproblems by setting (x + -1.125) equal to 2.348536779 and -2.348536779.Subproblem 1
x + -1.125 = 2.348536779 Simplifying x + -1.125 = 2.348536779 Reorder the terms: -1.125 + x = 2.348536779 Solving -1.125 + x = 2.348536779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 2.348536779 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 2.348536779 + 1.125 x = 2.348536779 + 1.125 Combine like terms: 2.348536779 + 1.125 = 3.473536779 x = 3.473536779 Simplifying x = 3.473536779Subproblem 2
x + -1.125 = -2.348536779 Simplifying x + -1.125 = -2.348536779 Reorder the terms: -1.125 + x = -2.348536779 Solving -1.125 + x = -2.348536779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -2.348536779 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -2.348536779 + 1.125 x = -2.348536779 + 1.125 Combine like terms: -2.348536779 + 1.125 = -1.223536779 x = -1.223536779 Simplifying x = -1.223536779Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.473536779, -1.223536779}
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