25(t)=-16t^2+25

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


Simplifying
25(t) = -16t2 + 25

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

Solving
25t = 25 + -16t2

Solving for variable 't'.

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

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

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

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

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

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

Move the constant term to the right:

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

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

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

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

The t term is 1.5625t.  Take half its coefficient (0.78125).
Square it (0.6103515625) and add it to both sides.

Add '0.6103515625' to each side of the equation.
1.5625t + 0.6103515625 + t2 = 1.5625 + 0.6103515625

Reorder the terms:
0.6103515625 + 1.5625t + t2 = 1.5625 + 0.6103515625

Combine like terms: 1.5625 + 0.6103515625 = 2.1728515625
0.6103515625 + 1.5625t + t2 = 2.1728515625

Factor a perfect square on the left side:
(t + 0.78125)(t + 0.78125) = 2.1728515625

Calculate the square root of the right side: 1.474059552

Break this problem into two subproblems by setting 
(t + 0.78125) equal to 1.474059552 and -1.474059552.

Subproblem 1

t + 0.78125 = 1.474059552 Simplifying t + 0.78125 = 1.474059552 Reorder the terms: 0.78125 + t = 1.474059552 Solving 0.78125 + t = 1.474059552 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + t = 1.474059552 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + t = 1.474059552 + -0.78125 t = 1.474059552 + -0.78125 Combine like terms: 1.474059552 + -0.78125 = 0.692809552 t = 0.692809552 Simplifying t = 0.692809552

Subproblem 2

t + 0.78125 = -1.474059552 Simplifying t + 0.78125 = -1.474059552 Reorder the terms: 0.78125 + t = -1.474059552 Solving 0.78125 + t = -1.474059552 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.78125' to each side of the equation. 0.78125 + -0.78125 + t = -1.474059552 + -0.78125 Combine like terms: 0.78125 + -0.78125 = 0.00000 0.00000 + t = -1.474059552 + -0.78125 t = -1.474059552 + -0.78125 Combine like terms: -1.474059552 + -0.78125 = -2.255309552 t = -2.255309552 Simplifying t = -2.255309552

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.692809552, -2.255309552}

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