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Simplifying (x + -3)(x + 4) = 7x Reorder the terms: (-3 + x)(x + 4) = 7x Reorder the terms: (-3 + x)(4 + x) = 7x Multiply (-3 + x) * (4 + x) (-3(4 + x) + x(4 + x)) = 7x ((4 * -3 + x * -3) + x(4 + x)) = 7x ((-12 + -3x) + x(4 + x)) = 7x (-12 + -3x + (4 * x + x * x)) = 7x (-12 + -3x + (4x + x2)) = 7x Combine like terms: -3x + 4x = 1x (-12 + 1x + x2) = 7x Solving -12 + 1x + x2 = 7x Solving for variable 'x'. Reorder the terms: -12 + 1x + -7x + x2 = 7x + -7x Combine like terms: 1x + -7x = -6x -12 + -6x + x2 = 7x + -7x Combine like terms: 7x + -7x = 0 -12 + -6x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '12' to each side of the equation. -12 + -6x + 12 + x2 = 0 + 12 Reorder the terms: -12 + 12 + -6x + x2 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -6x + x2 = 0 + 12 -6x + x2 = 0 + 12 Combine like terms: 0 + 12 = 12 -6x + x2 = 12 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 = 12 + 9 Reorder the terms: 9 + -6x + x2 = 12 + 9 Combine like terms: 12 + 9 = 21 9 + -6x + x2 = 21 Factor a perfect square on the left side: (x + -3)(x + -3) = 21 Calculate the square root of the right side: 4.582575695 Break this problem into two subproblems by setting (x + -3) equal to 4.582575695 and -4.582575695.Subproblem 1
x + -3 = 4.582575695 Simplifying x + -3 = 4.582575695 Reorder the terms: -3 + x = 4.582575695 Solving -3 + x = 4.582575695 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 = 4.582575695 + 3 Combine like terms: -3 + 3 = 0 0 + x = 4.582575695 + 3 x = 4.582575695 + 3 Combine like terms: 4.582575695 + 3 = 7.582575695 x = 7.582575695 Simplifying x = 7.582575695Subproblem 2
x + -3 = -4.582575695 Simplifying x + -3 = -4.582575695 Reorder the terms: -3 + x = -4.582575695 Solving -3 + x = -4.582575695 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 = -4.582575695 + 3 Combine like terms: -3 + 3 = 0 0 + x = -4.582575695 + 3 x = -4.582575695 + 3 Combine like terms: -4.582575695 + 3 = -1.582575695 x = -1.582575695 Simplifying x = -1.582575695Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.582575695, -1.582575695}
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