4=3+5t-5t^2

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Solution for 4=3+5t-5t^2 equation:


Simplifying
4 = 3 + 5t + -5t2

Solving
4 = 3 + 5t + -5t2

Solving for variable 't'.

Combine like terms: 4 + -3 = 1
1 + -5t + 5t2 = 3 + 5t + -5t2 + -3 + -5t + 5t2

Reorder the terms:
1 + -5t + 5t2 = 3 + -3 + 5t + -5t + -5t2 + 5t2

Combine like terms: 3 + -3 = 0
1 + -5t + 5t2 = 0 + 5t + -5t + -5t2 + 5t2
1 + -5t + 5t2 = 5t + -5t + -5t2 + 5t2

Combine like terms: 5t + -5t = 0
1 + -5t + 5t2 = 0 + -5t2 + 5t2
1 + -5t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
1 + -5t + 5t2 = 0

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

Divide each side by '5'.
0.2 + -1t + t2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -1t + -0.2 + t2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -1t + t2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -1t + t2 = 0 + -0.2
-1t + t2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-1t + t2 = -0.2

The t term is -1t.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1t + 0.25 + t2 = -0.2 + 0.25

Reorder the terms:
0.25 + -1t + t2 = -0.2 + 0.25

Combine like terms: -0.2 + 0.25 = 0.05
0.25 + -1t + t2 = 0.05

Factor a perfect square on the left side:
(t + -0.5)(t + -0.5) = 0.05

Calculate the square root of the right side: 0.223606798

Break this problem into two subproblems by setting 
(t + -0.5) equal to 0.223606798 and -0.223606798.

Subproblem 1

t + -0.5 = 0.223606798 Simplifying t + -0.5 = 0.223606798 Reorder the terms: -0.5 + t = 0.223606798 Solving -0.5 + t = 0.223606798 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = 0.223606798 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = 0.223606798 + 0.5 t = 0.223606798 + 0.5 Combine like terms: 0.223606798 + 0.5 = 0.723606798 t = 0.723606798 Simplifying t = 0.723606798

Subproblem 2

t + -0.5 = -0.223606798 Simplifying t + -0.5 = -0.223606798 Reorder the terms: -0.5 + t = -0.223606798 Solving -0.5 + t = -0.223606798 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = -0.223606798 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = -0.223606798 + 0.5 t = -0.223606798 + 0.5 Combine like terms: -0.223606798 + 0.5 = 0.276393202 t = 0.276393202 Simplifying t = 0.276393202

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.723606798, 0.276393202}

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