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Simplifying 2k2 + 20k + 73 = 9 Reorder the terms: 73 + 20k + 2k2 = 9 Solving 73 + 20k + 2k2 = 9 Solving for variable 'k'. Reorder the terms: 73 + -9 + 20k + 2k2 = 9 + -9 Combine like terms: 73 + -9 = 64 64 + 20k + 2k2 = 9 + -9 Combine like terms: 9 + -9 = 0 64 + 20k + 2k2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(32 + 10k + k2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(32 + 10k + k2)' equal to zero and attempt to solve: Simplifying 32 + 10k + k2 = 0 Solving 32 + 10k + k2 = 0 Begin completing the square. Move the constant term to the right: Add '-32' to each side of the equation. 32 + 10k + -32 + k2 = 0 + -32 Reorder the terms: 32 + -32 + 10k + k2 = 0 + -32 Combine like terms: 32 + -32 = 0 0 + 10k + k2 = 0 + -32 10k + k2 = 0 + -32 Combine like terms: 0 + -32 = -32 10k + k2 = -32 The k term is 10k. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10k + 25 + k2 = -32 + 25 Reorder the terms: 25 + 10k + k2 = -32 + 25 Combine like terms: -32 + 25 = -7 25 + 10k + k2 = -7 Factor a perfect square on the left side: (k + 5)(k + 5) = -7 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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