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Simplifying 9 = 0t + 0.5 * 9.8t * t Anything times zero is zero. 9 = 0t + 0.5 * 9.8t * t Multiply 0.5 * 9.8 9 = 0 + 4.9t * t Multiply t * t 9 = 0 + 4.9t2 Remove the zero: 9 = 4.9t2 Solving 9 = 4.9t2 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4.9t2' to each side of the equation. 9 + -4.9t2 = 4.9t2 + -4.9t2 Combine like terms: 4.9t2 + -4.9t2 = 0.0 9 + -4.9t2 = 0.0 Add '-9' to each side of the equation. 9 + -9 + -4.9t2 = 0.0 + -9 Combine like terms: 9 + -9 = 0 0 + -4.9t2 = 0.0 + -9 -4.9t2 = 0.0 + -9 Combine like terms: 0.0 + -9 = -9 -4.9t2 = -9 Divide each side by '-4.9'. t2 = 1.836734694 Simplifying t2 = 1.836734694 Take the square root of each side: t = {-1.355261854, 1.355261854}
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