0=20-5t^2

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Solution for 0=20-5t^2 equation: 


Simplifying
0 = 20 + -5t2

Solving
0 = 20 + -5t2

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '5t2' to each side of the equation.
0 + 5t2 = 20 + -5t2 + 5t2
Remove the zero:
5t2 = 20 + -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
5t2 = 20 + 0
5t2 = 20

Divide each side by '5'.
t2 = 4

Simplifying
t2 = 4

Take the square root of each side:
t = {-2, 2}

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