5t^2-17t+20=19

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Solution for 5t^2-17t+20=19 equation:


Simplifying
5t2 + -17t + 20 = 19

Reorder the terms:
20 + -17t + 5t2 = 19

Solving
20 + -17t + 5t2 = 19

Solving for variable 't'.

Reorder the terms:
20 + -19 + -17t + 5t2 = 19 + -19

Combine like terms: 20 + -19 = 1
1 + -17t + 5t2 = 19 + -19

Combine like terms: 19 + -19 = 0
1 + -17t + 5t2 = 0

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

Divide each side by '5'.
0.2 + -3.4t + t2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -3.4t + -0.2 + t2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -3.4t + t2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -3.4t + t2 = 0 + -0.2
-3.4t + t2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-3.4t + t2 = -0.2

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 = -0.2 + 2.89

Reorder the terms:
2.89 + -3.4t + t2 = -0.2 + 2.89

Combine like terms: -0.2 + 2.89 = 2.69
2.89 + -3.4t + t2 = 2.69

Factor a perfect square on the left side:
(t + -1.7)(t + -1.7) = 2.69

Calculate the square root of the right side: 1.640121947

Break this problem into two subproblems by setting 
(t + -1.7) equal to 1.640121947 and -1.640121947.

Subproblem 1

t + -1.7 = 1.640121947 Simplifying t + -1.7 = 1.640121947 Reorder the terms: -1.7 + t = 1.640121947 Solving -1.7 + t = 1.640121947 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 = 1.640121947 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + t = 1.640121947 + 1.7 t = 1.640121947 + 1.7 Combine like terms: 1.640121947 + 1.7 = 3.340121947 t = 3.340121947 Simplifying t = 3.340121947

Subproblem 2

t + -1.7 = -1.640121947 Simplifying t + -1.7 = -1.640121947 Reorder the terms: -1.7 + t = -1.640121947 Solving -1.7 + t = -1.640121947 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 = -1.640121947 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + t = -1.640121947 + 1.7 t = -1.640121947 + 1.7 Combine like terms: -1.640121947 + 1.7 = 0.059878053 t = 0.059878053 Simplifying t = 0.059878053

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.340121947, 0.059878053}

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