(.9t^2)+(8t)-50=0

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Solution for (.9t^2)+(8t)-50=0 equation:


Simplifying
(0.9t2) + (8t) + -50 = 0

Reorder the terms:
-50 + (8t) + (0.9t2) = 0

Solving
-50 + (8t) + (0.9t2) = 0

Solving for variable 't'.

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

Divide each side by '0.9'.
-55.55555556 + (8.888888889t) + t2 = 0

Move the constant term to the right:

Add '55.55555556' to each side of the equation.
-55.55555556 + (8.888888889t) + 55.55555556 + t2 = 0 + 55.55555556

Reorder the terms:
-55.55555556 + 55.55555556 + (8.888888889t) + t2 = 0 + 55.55555556

Combine like terms: -55.55555556 + 55.55555556 = 0.00000000
0.00000000 + (8.888888889t) + t2 = 0 + 55.55555556
(8.888888889t) + t2 = 0 + 55.55555556

Combine like terms: 0 + 55.55555556 = 55.55555556
(8.888888889t) + t2 = 55.55555556

The t term is (8.888888889t).  Take half its coefficient (4.444444445).
Square it (19.75308642) and add it to both sides.

Add '19.75308642' to each side of the equation.
(8.888888889t) + 19.75308642 + t2 = 55.55555556 + 19.75308642

Reorder the terms:
19.75308642 + (8.888888889t) + t2 = 55.55555556 + 19.75308642

Combine like terms: 55.55555556 + 19.75308642 = 75.30864198
19.75308642 + (8.888888889t) + t2 = 75.30864198

Factor a perfect square on the left side:
((t) + 4.444444445)((t) + 4.444444445) = 75.30864198

Calculate the square root of the right side: 8.678055196

Break this problem into two subproblems by setting 
((t) + 4.444444445) equal to 8.678055196 and -8.678055196.

Subproblem 1

(t) + 4.444444445 = 8.678055196 Simplifying (t) + 4.444444445 = 8.678055196 t + 4.444444445 = 8.678055196 Reorder the terms: 4.444444445 + t = 8.678055196 Solving 4.444444445 + t = 8.678055196 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4.444444445' to each side of the equation. 4.444444445 + -4.444444445 + t = 8.678055196 + -4.444444445 Combine like terms: 4.444444445 + -4.444444445 = 0.000000000 0.000000000 + t = 8.678055196 + -4.444444445 t = 8.678055196 + -4.444444445 Combine like terms: 8.678055196 + -4.444444445 = 4.233610751 t = 4.233610751 Simplifying t = 4.233610751

Subproblem 2

(t) + 4.444444445 = -8.678055196 Simplifying (t) + 4.444444445 = -8.678055196 t + 4.444444445 = -8.678055196 Reorder the terms: 4.444444445 + t = -8.678055196 Solving 4.444444445 + t = -8.678055196 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4.444444445' to each side of the equation. 4.444444445 + -4.444444445 + t = -8.678055196 + -4.444444445 Combine like terms: 4.444444445 + -4.444444445 = 0.000000000 0.000000000 + t = -8.678055196 + -4.444444445 t = -8.678055196 + -4.444444445 Combine like terms: -8.678055196 + -4.444444445 = -13.122499641 t = -13.122499641 Simplifying t = -13.122499641

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.233610751, -13.122499641}

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