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Simplifying 0 = x2 + 7x + 22 Reorder the terms: 0 = 22 + 7x + x2 Solving 0 = 22 + 7x + x2 Solving for variable 'x'. Combine like terms: 0 + -22 = -22 -22 + -7x + -1x2 = 22 + 7x + x2 + -22 + -7x + -1x2 Reorder the terms: -22 + -7x + -1x2 = 22 + -22 + 7x + -7x + x2 + -1x2 Combine like terms: 22 + -22 = 0 -22 + -7x + -1x2 = 0 + 7x + -7x + x2 + -1x2 -22 + -7x + -1x2 = 7x + -7x + x2 + -1x2 Combine like terms: 7x + -7x = 0 -22 + -7x + -1x2 = 0 + x2 + -1x2 -22 + -7x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -22 + -7x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(22 + 7x + x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(22 + 7x + x2)' equal to zero and attempt to solve: Simplifying 22 + 7x + x2 = 0 Solving 22 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-22' to each side of the equation. 22 + 7x + -22 + x2 = 0 + -22 Reorder the terms: 22 + -22 + 7x + x2 = 0 + -22 Combine like terms: 22 + -22 = 0 0 + 7x + x2 = 0 + -22 7x + x2 = 0 + -22 Combine like terms: 0 + -22 = -22 7x + x2 = -22 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = -22 + 12.25 Reorder the terms: 12.25 + 7x + x2 = -22 + 12.25 Combine like terms: -22 + 12.25 = -9.75 12.25 + 7x + x2 = -9.75 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = -9.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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