25=-16t^2+39t

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Solution for 25=-16t^2+39t equation:


Simplifying
25 = -16t2 + 39t

Reorder the terms:
25 = 39t + -16t2

Solving
25 = 39t + -16t2

Solving for variable 't'.

Reorder the terms:
25 + -39t + 16t2 = 39t + -39t + -16t2 + 16t2

Combine like terms: 39t + -39t = 0
25 + -39t + 16t2 = 0 + -16t2 + 16t2
25 + -39t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
25 + -39t + 16t2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
1.5625 + -2.4375t + t2 = 0

Move the constant term to the right:

Add '-1.5625' to each side of the equation.
1.5625 + -2.4375t + -1.5625 + t2 = 0 + -1.5625

Reorder the terms:
1.5625 + -1.5625 + -2.4375t + t2 = 0 + -1.5625

Combine like terms: 1.5625 + -1.5625 = 0.0000
0.0000 + -2.4375t + t2 = 0 + -1.5625
-2.4375t + t2 = 0 + -1.5625

Combine like terms: 0 + -1.5625 = -1.5625
-2.4375t + t2 = -1.5625

The t term is -2.4375t.  Take half its coefficient (-1.21875).
Square it (1.485351563) and add it to both sides.

Add '1.485351563' to each side of the equation.
-2.4375t + 1.485351563 + t2 = -1.5625 + 1.485351563

Reorder the terms:
1.485351563 + -2.4375t + t2 = -1.5625 + 1.485351563

Combine like terms: -1.5625 + 1.485351563 = -0.077148437
1.485351563 + -2.4375t + t2 = -0.077148437

Factor a perfect square on the left side:
(t + -1.21875)(t + -1.21875) = -0.077148437

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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