0=40-4.9t^2

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Solution for 0=40-4.9t^2 equation:


Simplifying
0 = 40 + -4.9t2

Solving
0 = 40 + -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.
0 + 4.9t2 = 40 + -4.9t2 + 4.9t2
Remove the zero:
4.9t2 = 40 + -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
4.9t2 = 40 + 0.0
4.9t2 = 40

Divide each side by '4.9'.
t2 = 8.163265306

Simplifying
t2 = 8.163265306

Take the square root of each side:
t = {-2.857142857, 2.857142857}

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