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Simplifying 4x2 + 24x + 15 = 0 Reorder the terms: 15 + 24x + 4x2 = 0 Solving 15 + 24x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 3.75 + 6x + x2 = 0 Move the constant term to the right: Add '-3.75' to each side of the equation. 3.75 + 6x + -3.75 + x2 = 0 + -3.75 Reorder the terms: 3.75 + -3.75 + 6x + x2 = 0 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + 6x + x2 = 0 + -3.75 6x + x2 = 0 + -3.75 Combine like terms: 0 + -3.75 = -3.75 6x + x2 = -3.75 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -3.75 + 9 Reorder the terms: 9 + 6x + x2 = -3.75 + 9 Combine like terms: -3.75 + 9 = 5.25 9 + 6x + x2 = 5.25 Factor a perfect square on the left side: (x + 3)(x + 3) = 5.25 Calculate the square root of the right side: 2.291287847 Break this problem into two subproblems by setting (x + 3) equal to 2.291287847 and -2.291287847.Subproblem 1
x + 3 = 2.291287847 Simplifying x + 3 = 2.291287847 Reorder the terms: 3 + x = 2.291287847 Solving 3 + x = 2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 2.291287847 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.291287847 + -3 x = 2.291287847 + -3 Combine like terms: 2.291287847 + -3 = -0.708712153 x = -0.708712153 Simplifying x = -0.708712153Subproblem 2
x + 3 = -2.291287847 Simplifying x + 3 = -2.291287847 Reorder the terms: 3 + x = -2.291287847 Solving 3 + x = -2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -2.291287847 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.291287847 + -3 x = -2.291287847 + -3 Combine like terms: -2.291287847 + -3 = -5.291287847 x = -5.291287847 Simplifying x = -5.291287847Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.708712153, -5.291287847}
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