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Simplifying -5x + -4(3 + 4x) = 4x(x + -3) + -28 -5x + (3 * -4 + 4x * -4) = 4x(x + -3) + -28 -5x + (-12 + -16x) = 4x(x + -3) + -28 Reorder the terms: -12 + -5x + -16x = 4x(x + -3) + -28 Combine like terms: -5x + -16x = -21x -12 + -21x = 4x(x + -3) + -28 Reorder the terms: -12 + -21x = 4x(-3 + x) + -28 -12 + -21x = (-3 * 4x + x * 4x) + -28 -12 + -21x = (-12x + 4x2) + -28 Reorder the terms: -12 + -21x = -28 + -12x + 4x2 Solving -12 + -21x = -28 + -12x + 4x2 Solving for variable 'x'. Reorder the terms: -12 + 28 + -21x + 12x + -4x2 = -28 + -12x + 4x2 + 28 + 12x + -4x2 Combine like terms: -12 + 28 = 16 16 + -21x + 12x + -4x2 = -28 + -12x + 4x2 + 28 + 12x + -4x2 Combine like terms: -21x + 12x = -9x 16 + -9x + -4x2 = -28 + -12x + 4x2 + 28 + 12x + -4x2 Reorder the terms: 16 + -9x + -4x2 = -28 + 28 + -12x + 12x + 4x2 + -4x2 Combine like terms: -28 + 28 = 0 16 + -9x + -4x2 = 0 + -12x + 12x + 4x2 + -4x2 16 + -9x + -4x2 = -12x + 12x + 4x2 + -4x2 Combine like terms: -12x + 12x = 0 16 + -9x + -4x2 = 0 + 4x2 + -4x2 16 + -9x + -4x2 = 4x2 + -4x2 Combine like terms: 4x2 + -4x2 = 0 16 + -9x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -4 + 2.25x + x2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 2.25x + 4 + x2 = 0 + 4 Reorder the terms: -4 + 4 + 2.25x + x2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 2.25x + x2 = 0 + 4 2.25x + x2 = 0 + 4 Combine like terms: 0 + 4 = 4 2.25x + x2 = 4 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 + 1.265625 Reorder the terms: 1.265625 + 2.25x + x2 = 4 + 1.265625 Combine like terms: 4 + 1.265625 = 5.265625 1.265625 + 2.25x + x2 = 5.265625 Factor a perfect square on the left side: (x + 1.125)(x + 1.125) = 5.265625 Calculate the square root of the right side: 2.294694969 Break this problem into two subproblems by setting (x + 1.125) equal to 2.294694969 and -2.294694969.Subproblem 1
x + 1.125 = 2.294694969 Simplifying x + 1.125 = 2.294694969 Reorder the terms: 1.125 + x = 2.294694969 Solving 1.125 + x = 2.294694969 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 = 2.294694969 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = 2.294694969 + -1.125 x = 2.294694969 + -1.125 Combine like terms: 2.294694969 + -1.125 = 1.169694969 x = 1.169694969 Simplifying x = 1.169694969Subproblem 2
x + 1.125 = -2.294694969 Simplifying x + 1.125 = -2.294694969 Reorder the terms: 1.125 + x = -2.294694969 Solving 1.125 + x = -2.294694969 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 = -2.294694969 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + x = -2.294694969 + -1.125 x = -2.294694969 + -1.125 Combine like terms: -2.294694969 + -1.125 = -3.419694969 x = -3.419694969 Simplifying x = -3.419694969Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.169694969, -3.419694969}
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