-16t^2-5t+4=-100

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Solution for -16t^2-5t+4=-100 equation:


Simplifying
-16t2 + -5t + 4 = -100

Reorder the terms:
4 + -5t + -16t2 = -100

Solving
4 + -5t + -16t2 = -100

Solving for variable 't'.

Reorder the terms:
4 + 100 + -5t + -16t2 = -100 + 100

Combine like terms: 4 + 100 = 104
104 + -5t + -16t2 = -100 + 100

Combine like terms: -100 + 100 = 0
104 + -5t + -16t2 = 0

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

Divide each side by '-16'.
-6.5 + 0.3125t + t2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + 0.3125t + 6.5 + t2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + 0.3125t + t2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + 0.3125t + t2 = 0 + 6.5
0.3125t + t2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
0.3125t + t2 = 6.5

The t term is 0.3125t.  Take half its coefficient (0.15625).
Square it (0.0244140625) and add it to both sides.

Add '0.0244140625' to each side of the equation.
0.3125t + 0.0244140625 + t2 = 6.5 + 0.0244140625

Reorder the terms:
0.0244140625 + 0.3125t + t2 = 6.5 + 0.0244140625

Combine like terms: 6.5 + 0.0244140625 = 6.5244140625
0.0244140625 + 0.3125t + t2 = 6.5244140625

Factor a perfect square on the left side:
(t + 0.15625)(t + 0.15625) = 6.5244140625

Calculate the square root of the right side: 2.554293261

Break this problem into two subproblems by setting 
(t + 0.15625) equal to 2.554293261 and -2.554293261.

Subproblem 1

t + 0.15625 = 2.554293261 Simplifying t + 0.15625 = 2.554293261 Reorder the terms: 0.15625 + t = 2.554293261 Solving 0.15625 + t = 2.554293261 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.15625' to each side of the equation. 0.15625 + -0.15625 + t = 2.554293261 + -0.15625 Combine like terms: 0.15625 + -0.15625 = 0.00000 0.00000 + t = 2.554293261 + -0.15625 t = 2.554293261 + -0.15625 Combine like terms: 2.554293261 + -0.15625 = 2.398043261 t = 2.398043261 Simplifying t = 2.398043261

Subproblem 2

t + 0.15625 = -2.554293261 Simplifying t + 0.15625 = -2.554293261 Reorder the terms: 0.15625 + t = -2.554293261 Solving 0.15625 + t = -2.554293261 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.15625' to each side of the equation. 0.15625 + -0.15625 + t = -2.554293261 + -0.15625 Combine like terms: 0.15625 + -0.15625 = 0.00000 0.00000 + t = -2.554293261 + -0.15625 t = -2.554293261 + -0.15625 Combine like terms: -2.554293261 + -0.15625 = -2.710543261 t = -2.710543261 Simplifying t = -2.710543261

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.398043261, -2.710543261}

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