-1.75t^2+20.5t-50.65=0

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Solution for -1.75t^2+20.5t-50.65=0 equation:


Simplifying
-1.75t2 + 20.5t + -50.65 = 0

Reorder the terms:
-50.65 + 20.5t + -1.75t2 = 0

Solving
-50.65 + 20.5t + -1.75t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-1.75 the coefficient of the squared term: 

Divide each side by '-1.75'.
28.94285714 + -11.71428571t + t2 = 0

Move the constant term to the right:

Add '-28.94285714' to each side of the equation.
28.94285714 + -11.71428571t + -28.94285714 + t2 = 0 + -28.94285714

Reorder the terms:
28.94285714 + -28.94285714 + -11.71428571t + t2 = 0 + -28.94285714

Combine like terms: 28.94285714 + -28.94285714 = 0.00000000
0.00000000 + -11.71428571t + t2 = 0 + -28.94285714
-11.71428571t + t2 = 0 + -28.94285714

Combine like terms: 0 + -28.94285714 = -28.94285714
-11.71428571t + t2 = -28.94285714

The t term is -11.71428571t.  Take half its coefficient (-5.857142855).
Square it (34.30612242) and add it to both sides.

Add '34.30612242' to each side of the equation.
-11.71428571t + 34.30612242 + t2 = -28.94285714 + 34.30612242

Reorder the terms:
34.30612242 + -11.71428571t + t2 = -28.94285714 + 34.30612242

Combine like terms: -28.94285714 + 34.30612242 = 5.36326528
34.30612242 + -11.71428571t + t2 = 5.36326528

Factor a perfect square on the left side:
(t + -5.857142855)(t + -5.857142855) = 5.36326528

Calculate the square root of the right side: 2.315872466

Break this problem into two subproblems by setting 
(t + -5.857142855) equal to 2.315872466 and -2.315872466.

Subproblem 1

t + -5.857142855 = 2.315872466 Simplifying t + -5.857142855 = 2.315872466 Reorder the terms: -5.857142855 + t = 2.315872466 Solving -5.857142855 + t = 2.315872466 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.857142855' to each side of the equation. -5.857142855 + 5.857142855 + t = 2.315872466 + 5.857142855 Combine like terms: -5.857142855 + 5.857142855 = 0.000000000 0.000000000 + t = 2.315872466 + 5.857142855 t = 2.315872466 + 5.857142855 Combine like terms: 2.315872466 + 5.857142855 = 8.173015321 t = 8.173015321 Simplifying t = 8.173015321

Subproblem 2

t + -5.857142855 = -2.315872466 Simplifying t + -5.857142855 = -2.315872466 Reorder the terms: -5.857142855 + t = -2.315872466 Solving -5.857142855 + t = -2.315872466 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.857142855' to each side of the equation. -5.857142855 + 5.857142855 + t = -2.315872466 + 5.857142855 Combine like terms: -5.857142855 + 5.857142855 = 0.000000000 0.000000000 + t = -2.315872466 + 5.857142855 t = -2.315872466 + 5.857142855 Combine like terms: -2.315872466 + 5.857142855 = 3.541270389 t = 3.541270389 Simplifying t = 3.541270389

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.173015321, 3.541270389}

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