5+25t-16t^2=4

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Solution for 5+25t-16t^2=4 equation:


Simplifying
5 + 25t + -16t2 = 4

Solving
5 + 25t + -16t2 = 4

Solving for variable 't'.

Reorder the terms:
5 + -4 + 25t + -16t2 = 4 + -4

Combine like terms: 5 + -4 = 1
1 + 25t + -16t2 = 4 + -4

Combine like terms: 4 + -4 = 0
1 + 25t + -16t2 = 0

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

Divide each side by '-16'.
-0.0625 + -1.5625t + t2 = 0

Move the constant term to the right:

Add '0.0625' to each side of the equation.
-0.0625 + -1.5625t + 0.0625 + t2 = 0 + 0.0625

Reorder the terms:
-0.0625 + 0.0625 + -1.5625t + t2 = 0 + 0.0625

Combine like terms: -0.0625 + 0.0625 = 0.0000
0.0000 + -1.5625t + t2 = 0 + 0.0625
-1.5625t + t2 = 0 + 0.0625

Combine like terms: 0 + 0.0625 = 0.0625
-1.5625t + t2 = 0.0625

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 = 0.0625 + 0.6103515625

Reorder the terms:
0.6103515625 + -1.5625t + t2 = 0.0625 + 0.6103515625

Combine like terms: 0.0625 + 0.6103515625 = 0.6728515625
0.6103515625 + -1.5625t + t2 = 0.6728515625

Factor a perfect square on the left side:
(t + -0.78125)(t + -0.78125) = 0.6728515625

Calculate the square root of the right side: 0.820275297

Break this problem into two subproblems by setting 
(t + -0.78125) equal to 0.820275297 and -0.820275297.

Subproblem 1

t + -0.78125 = 0.820275297 Simplifying t + -0.78125 = 0.820275297 Reorder the terms: -0.78125 + t = 0.820275297 Solving -0.78125 + t = 0.820275297 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 = 0.820275297 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + t = 0.820275297 + 0.78125 t = 0.820275297 + 0.78125 Combine like terms: 0.820275297 + 0.78125 = 1.601525297 t = 1.601525297 Simplifying t = 1.601525297

Subproblem 2

t + -0.78125 = -0.820275297 Simplifying t + -0.78125 = -0.820275297 Reorder the terms: -0.78125 + t = -0.820275297 Solving -0.78125 + t = -0.820275297 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 = -0.820275297 + 0.78125 Combine like terms: -0.78125 + 0.78125 = 0.00000 0.00000 + t = -0.820275297 + 0.78125 t = -0.820275297 + 0.78125 Combine like terms: -0.820275297 + 0.78125 = -0.039025297 t = -0.039025297 Simplifying t = -0.039025297

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.601525297, -0.039025297}

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