-5t^2+20t+5=3t+3

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Solution for -5t^2+20t+5=3t+3 equation:


Simplifying
-5t2 + 20t + 5 = 3t + 3

Reorder the terms:
5 + 20t + -5t2 = 3t + 3

Reorder the terms:
5 + 20t + -5t2 = 3 + 3t

Solving
5 + 20t + -5t2 = 3 + 3t

Solving for variable 't'.

Reorder the terms:
5 + -3 + 20t + -3t + -5t2 = 3 + 3t + -3 + -3t

Combine like terms: 5 + -3 = 2
2 + 20t + -3t + -5t2 = 3 + 3t + -3 + -3t

Combine like terms: 20t + -3t = 17t
2 + 17t + -5t2 = 3 + 3t + -3 + -3t

Reorder the terms:
2 + 17t + -5t2 = 3 + -3 + 3t + -3t

Combine like terms: 3 + -3 = 0
2 + 17t + -5t2 = 0 + 3t + -3t
2 + 17t + -5t2 = 3t + -3t

Combine like terms: 3t + -3t = 0
2 + 17t + -5t2 = 0

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

Divide each side by '-5'.
-0.4 + -3.4t + t2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -3.4t + 0.4 + t2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -3.4t + t2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -3.4t + t2 = 0 + 0.4
-3.4t + t2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-3.4t + t2 = 0.4

The t term is -3.4t.  Take half its coefficient (-1.7).
Square it (2.89) and add it to both sides.

Add '2.89' to each side of the equation.
-3.4t + 2.89 + t2 = 0.4 + 2.89

Reorder the terms:
2.89 + -3.4t + t2 = 0.4 + 2.89

Combine like terms: 0.4 + 2.89 = 3.29
2.89 + -3.4t + t2 = 3.29

Factor a perfect square on the left side:
(t + -1.7)(t + -1.7) = 3.29

Calculate the square root of the right side: 1.813835715

Break this problem into two subproblems by setting 
(t + -1.7) equal to 1.813835715 and -1.813835715.

Subproblem 1

t + -1.7 = 1.813835715 Simplifying t + -1.7 = 1.813835715 Reorder the terms: -1.7 + t = 1.813835715 Solving -1.7 + t = 1.813835715 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + t = 1.813835715 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + t = 1.813835715 + 1.7 t = 1.813835715 + 1.7 Combine like terms: 1.813835715 + 1.7 = 3.513835715 t = 3.513835715 Simplifying t = 3.513835715

Subproblem 2

t + -1.7 = -1.813835715 Simplifying t + -1.7 = -1.813835715 Reorder the terms: -1.7 + t = -1.813835715 Solving -1.7 + t = -1.813835715 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + t = -1.813835715 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + t = -1.813835715 + 1.7 t = -1.813835715 + 1.7 Combine like terms: -1.813835715 + 1.7 = -0.113835715 t = -0.113835715 Simplifying t = -0.113835715

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.513835715, -0.113835715}

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