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Simplifying -3x(x + 3) = -3(x + 1) + -5 Reorder the terms: -3x(3 + x) = -3(x + 1) + -5 (3 * -3x + x * -3x) = -3(x + 1) + -5 (-9x + -3x2) = -3(x + 1) + -5 Reorder the terms: -9x + -3x2 = -3(1 + x) + -5 -9x + -3x2 = (1 * -3 + x * -3) + -5 -9x + -3x2 = (-3 + -3x) + -5 Reorder the terms: -9x + -3x2 = -3 + -5 + -3x Combine like terms: -3 + -5 = -8 -9x + -3x2 = -8 + -3x Solving -9x + -3x2 = -8 + -3x Solving for variable 'x'. Reorder the terms: 8 + -9x + 3x + -3x2 = -8 + -3x + 8 + 3x Combine like terms: -9x + 3x = -6x 8 + -6x + -3x2 = -8 + -3x + 8 + 3x Reorder the terms: 8 + -6x + -3x2 = -8 + 8 + -3x + 3x Combine like terms: -8 + 8 = 0 8 + -6x + -3x2 = 0 + -3x + 3x 8 + -6x + -3x2 = -3x + 3x Combine like terms: -3x + 3x = 0 8 + -6x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -2.666666667 + 2x + x2 = 0 Move the constant term to the right: Add '2.666666667' to each side of the equation. -2.666666667 + 2x + 2.666666667 + x2 = 0 + 2.666666667 Reorder the terms: -2.666666667 + 2.666666667 + 2x + x2 = 0 + 2.666666667 Combine like terms: -2.666666667 + 2.666666667 = 0.000000000 0.000000000 + 2x + x2 = 0 + 2.666666667 2x + x2 = 0 + 2.666666667 Combine like terms: 0 + 2.666666667 = 2.666666667 2x + x2 = 2.666666667 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 2.666666667 + 1 Reorder the terms: 1 + 2x + x2 = 2.666666667 + 1 Combine like terms: 2.666666667 + 1 = 3.666666667 1 + 2x + x2 = 3.666666667 Factor a perfect square on the left side: (x + 1)(x + 1) = 3.666666667 Calculate the square root of the right side: 1.914854216 Break this problem into two subproblems by setting (x + 1) equal to 1.914854216 and -1.914854216.Subproblem 1
x + 1 = 1.914854216 Simplifying x + 1 = 1.914854216 Reorder the terms: 1 + x = 1.914854216 Solving 1 + x = 1.914854216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.914854216 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.914854216 + -1 x = 1.914854216 + -1 Combine like terms: 1.914854216 + -1 = 0.914854216 x = 0.914854216 Simplifying x = 0.914854216Subproblem 2
x + 1 = -1.914854216 Simplifying x + 1 = -1.914854216 Reorder the terms: 1 + x = -1.914854216 Solving 1 + x = -1.914854216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.914854216 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.914854216 + -1 x = -1.914854216 + -1 Combine like terms: -1.914854216 + -1 = -2.914854216 x = -2.914854216 Simplifying x = -2.914854216Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.914854216, -2.914854216}
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