-0.2=7.22t-4.9(t^2)

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Solution for -0.2=7.22t-4.9(t^2) equation:


Simplifying
-0.2 = 7.22t + -4.9(t2)

Solving
-0.2 = 7.22t + -4.9t2

Solving for variable 't'.

Reorder the terms:
-0.2 + -7.22t + 4.9t2 = 7.22t + -7.22t + -4.9t2 + 4.9t2

Combine like terms: 7.22t + -7.22t = 0.00
-0.2 + -7.22t + 4.9t2 = 0.00 + -4.9t2 + 4.9t2
-0.2 + -7.22t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-0.2 + -7.22t + 4.9t2 = 0.0

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

Divide each side by '4.9'.
-0.04081632653 + -1.473469388t + t2 = 0

Move the constant term to the right:

Add '0.04081632653' to each side of the equation.
-0.04081632653 + -1.473469388t + 0.04081632653 + t2 = 0 + 0.04081632653

Reorder the terms:
-0.04081632653 + 0.04081632653 + -1.473469388t + t2 = 0 + 0.04081632653

Combine like terms: -0.04081632653 + 0.04081632653 = 0.00000000000
0.00000000000 + -1.473469388t + t2 = 0 + 0.04081632653
-1.473469388t + t2 = 0 + 0.04081632653

Combine like terms: 0 + 0.04081632653 = 0.04081632653
-1.473469388t + t2 = 0.04081632653

The t term is -1.473469388t.  Take half its coefficient (-0.736734694).
Square it (0.5427780093) and add it to both sides.

Add '0.5427780093' to each side of the equation.
-1.473469388t + 0.5427780093 + t2 = 0.04081632653 + 0.5427780093

Reorder the terms:
0.5427780093 + -1.473469388t + t2 = 0.04081632653 + 0.5427780093

Combine like terms: 0.04081632653 + 0.5427780093 = 0.58359433583
0.5427780093 + -1.473469388t + t2 = 0.58359433583

Factor a perfect square on the left side:
(t + -0.736734694)(t + -0.736734694) = 0.58359433583

Calculate the square root of the right side: 0.763933463

Break this problem into two subproblems by setting 
(t + -0.736734694) equal to 0.763933463 and -0.763933463.

Subproblem 1

t + -0.736734694 = 0.763933463 Simplifying t + -0.736734694 = 0.763933463 Reorder the terms: -0.736734694 + t = 0.763933463 Solving -0.736734694 + t = 0.763933463 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.736734694' to each side of the equation. -0.736734694 + 0.736734694 + t = 0.763933463 + 0.736734694 Combine like terms: -0.736734694 + 0.736734694 = 0.000000000 0.000000000 + t = 0.763933463 + 0.736734694 t = 0.763933463 + 0.736734694 Combine like terms: 0.763933463 + 0.736734694 = 1.500668157 t = 1.500668157 Simplifying t = 1.500668157

Subproblem 2

t + -0.736734694 = -0.763933463 Simplifying t + -0.736734694 = -0.763933463 Reorder the terms: -0.736734694 + t = -0.763933463 Solving -0.736734694 + t = -0.763933463 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.736734694' to each side of the equation. -0.736734694 + 0.736734694 + t = -0.763933463 + 0.736734694 Combine like terms: -0.736734694 + 0.736734694 = 0.000000000 0.000000000 + t = -0.763933463 + 0.736734694 t = -0.763933463 + 0.736734694 Combine like terms: -0.763933463 + 0.736734694 = -0.027198769 t = -0.027198769 Simplifying t = -0.027198769

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.500668157, -0.027198769}

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