-16t^2+45t+4=0

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Solution for -16t^2+45t+4=0 equation:


Simplifying
-16t2 + 45t + 4 = 0

Reorder the terms:
4 + 45t + -16t2 = 0

Solving
4 + 45t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
-0.25 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -2.8125t + 0.25 + t2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -2.8125t + t2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -2.8125t + t2 = 0 + 0.25
-2.8125t + t2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-2.8125t + t2 = 0.25

The t term is -2.8125t.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125t + 1.977539063 + t2 = 0.25 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = 0.25 + 1.977539063

Combine like terms: 0.25 + 1.977539063 = 2.227539063
1.977539063 + -2.8125t + t2 = 2.227539063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 2.227539063

Calculate the square root of the right side: 1.492494242

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 1.492494242 and -1.492494242.

Subproblem 1

t + -1.40625 = 1.492494242 Simplifying t + -1.40625 = 1.492494242 Reorder the terms: -1.40625 + t = 1.492494242 Solving -1.40625 + t = 1.492494242 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = 1.492494242 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 1.492494242 + 1.40625 t = 1.492494242 + 1.40625 Combine like terms: 1.492494242 + 1.40625 = 2.898744242 t = 2.898744242 Simplifying t = 2.898744242

Subproblem 2

t + -1.40625 = -1.492494242 Simplifying t + -1.40625 = -1.492494242 Reorder the terms: -1.40625 + t = -1.492494242 Solving -1.40625 + t = -1.492494242 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = -1.492494242 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -1.492494242 + 1.40625 t = -1.492494242 + 1.40625 Combine like terms: -1.492494242 + 1.40625 = -0.086244242 t = -0.086244242 Simplifying t = -0.086244242

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.898744242, -0.086244242}

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