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Simplifying 4t2 + -18t + 21 = 0 Reorder the terms: 21 + -18t + 4t2 = 0 Solving 21 + -18t + 4t2 = 0 Solving for variable 't'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 5.25 + -4.5t + t2 = 0 Move the constant term to the right: Add '-5.25' to each side of the equation. 5.25 + -4.5t + -5.25 + t2 = 0 + -5.25 Reorder the terms: 5.25 + -5.25 + -4.5t + t2 = 0 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + -4.5t + t2 = 0 + -5.25 -4.5t + t2 = 0 + -5.25 Combine like terms: 0 + -5.25 = -5.25 -4.5t + t2 = -5.25 The t term is -4.5t. Take half its coefficient (-2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. -4.5t + 5.0625 + t2 = -5.25 + 5.0625 Reorder the terms: 5.0625 + -4.5t + t2 = -5.25 + 5.0625 Combine like terms: -5.25 + 5.0625 = -0.1875 5.0625 + -4.5t + t2 = -0.1875 Factor a perfect square on the left side: (t + -2.25)(t + -2.25) = -0.1875 Can't calculate square root of the right side. The solution to this equation could not be determined.
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