0=0.0625t^2+3t+20

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Solution for 0=0.0625t^2+3t+20 equation:


Simplifying
0 = 0.0625t2 + 3t + 20

Reorder the terms:
0 = 20 + 3t + 0.0625t2

Solving
0 = 20 + 3t + 0.0625t2

Solving for variable 't'.

Combine like terms: 0 + -20 = -20
-20 + -3t + -0.0625t2 = 20 + 3t + 0.0625t2 + -20 + -3t + -0.0625t2

Reorder the terms:
-20 + -3t + -0.0625t2 = 20 + -20 + 3t + -3t + 0.0625t2 + -0.0625t2

Combine like terms: 20 + -20 = 0
-20 + -3t + -0.0625t2 = 0 + 3t + -3t + 0.0625t2 + -0.0625t2
-20 + -3t + -0.0625t2 = 3t + -3t + 0.0625t2 + -0.0625t2

Combine like terms: 3t + -3t = 0
-20 + -3t + -0.0625t2 = 0 + 0.0625t2 + -0.0625t2
-20 + -3t + -0.0625t2 = 0.0625t2 + -0.0625t2

Combine like terms: 0.0625t2 + -0.0625t2 = 0.0000
-20 + -3t + -0.0625t2 = 0.0000

Begin completing the square.  Divide all terms by
-0.0625 the coefficient of the squared term: 

Divide each side by '-0.0625'.
320 + 48t + t2 = 0

Move the constant term to the right:

Add '-320' to each side of the equation.
320 + 48t + -320 + t2 = 0 + -320

Reorder the terms:
320 + -320 + 48t + t2 = 0 + -320

Combine like terms: 320 + -320 = 0
0 + 48t + t2 = 0 + -320
48t + t2 = 0 + -320

Combine like terms: 0 + -320 = -320
48t + t2 = -320

The t term is 48t.  Take half its coefficient (24).
Square it (576) and add it to both sides.

Add '576' to each side of the equation.
48t + 576 + t2 = -320 + 576

Reorder the terms:
576 + 48t + t2 = -320 + 576

Combine like terms: -320 + 576 = 256
576 + 48t + t2 = 256

Factor a perfect square on the left side:
(t + 24)(t + 24) = 256

Calculate the square root of the right side: 16

Break this problem into two subproblems by setting 
(t + 24) equal to 16 and -16.

Subproblem 1

t + 24 = 16 Simplifying t + 24 = 16 Reorder the terms: 24 + t = 16 Solving 24 + t = 16 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-24' to each side of the equation. 24 + -24 + t = 16 + -24 Combine like terms: 24 + -24 = 0 0 + t = 16 + -24 t = 16 + -24 Combine like terms: 16 + -24 = -8 t = -8 Simplifying t = -8

Subproblem 2

t + 24 = -16 Simplifying t + 24 = -16 Reorder the terms: 24 + t = -16 Solving 24 + t = -16 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-24' to each side of the equation. 24 + -24 + t = -16 + -24 Combine like terms: 24 + -24 = 0 0 + t = -16 + -24 t = -16 + -24 Combine like terms: -16 + -24 = -40 t = -40 Simplifying t = -40

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-8, -40}

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