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Simplifying 60 = 20t + -5t2 Solving 60 = 20t + -5t2 Solving for variable 't'. Reorder the terms: 60 + -20t + 5t2 = 20t + -20t + -5t2 + 5t2 Combine like terms: 20t + -20t = 0 60 + -20t + 5t2 = 0 + -5t2 + 5t2 60 + -20t + 5t2 = -5t2 + 5t2 Combine like terms: -5t2 + 5t2 = 0 60 + -20t + 5t2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(12 + -4t + t2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(12 + -4t + t2)' equal to zero and attempt to solve: Simplifying 12 + -4t + t2 = 0 Solving 12 + -4t + t2 = 0 Begin completing the square. Move the constant term to the right: Add '-12' to each side of the equation. 12 + -4t + -12 + t2 = 0 + -12 Reorder the terms: 12 + -12 + -4t + t2 = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -4t + t2 = 0 + -12 -4t + t2 = 0 + -12 Combine like terms: 0 + -12 = -12 -4t + t2 = -12 The t term is -4t. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4t + 4 + t2 = -12 + 4 Reorder the terms: 4 + -4t + t2 = -12 + 4 Combine like terms: -12 + 4 = -8 4 + -4t + t2 = -8 Factor a perfect square on the left side: (t + -2)(t + -2) = -8 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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