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Simplifying 7 = -5t2 + 6t Reorder the terms: 7 = 6t + -5t2 Solving 7 = 6t + -5t2 Solving for variable 't'. Reorder the terms: 7 + -6t + 5t2 = 6t + -6t + -5t2 + 5t2 Combine like terms: 6t + -6t = 0 7 + -6t + 5t2 = 0 + -5t2 + 5t2 7 + -6t + 5t2 = -5t2 + 5t2 Combine like terms: -5t2 + 5t2 = 0 7 + -6t + 5t2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 1.4 + -1.2t + t2 = 0 Move the constant term to the right: Add '-1.4' to each side of the equation. 1.4 + -1.2t + -1.4 + t2 = 0 + -1.4 Reorder the terms: 1.4 + -1.4 + -1.2t + t2 = 0 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + -1.2t + t2 = 0 + -1.4 -1.2t + t2 = 0 + -1.4 Combine like terms: 0 + -1.4 = -1.4 -1.2t + t2 = -1.4 The t term is -1.2t. Take half its coefficient (-0.6). Square it (0.36) and add it to both sides. Add '0.36' to each side of the equation. -1.2t + 0.36 + t2 = -1.4 + 0.36 Reorder the terms: 0.36 + -1.2t + t2 = -1.4 + 0.36 Combine like terms: -1.4 + 0.36 = -1.04 0.36 + -1.2t + t2 = -1.04 Factor a perfect square on the left side: (t + -0.6)(t + -0.6) = -1.04 Can't calculate square root of the right side. The solution to this equation could not be determined.
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