-3.7=9.05t-0.5*9.8t^2

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Solution for -3.7=9.05t-0.5*9.8t^2 equation:


Simplifying
-3.7 = 9.05t + -0.5 * 9.8t2

Multiply -0.5 * 9.8
-3.7 = 9.05t + -4.9t2

Solving
-3.7 = 9.05t + -4.9t2

Solving for variable 't'.

Reorder the terms:
-3.7 + -9.05t + 4.9t2 = 9.05t + -9.05t + -4.9t2 + 4.9t2

Combine like terms: 9.05t + -9.05t = 0.00
-3.7 + -9.05t + 4.9t2 = 0.00 + -4.9t2 + 4.9t2
-3.7 + -9.05t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-3.7 + -9.05t + 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'.
-0.7551020408 + -1.846938776t + t2 = 0

Move the constant term to the right:

Add '0.7551020408' to each side of the equation.
-0.7551020408 + -1.846938776t + 0.7551020408 + t2 = 0 + 0.7551020408

Reorder the terms:
-0.7551020408 + 0.7551020408 + -1.846938776t + t2 = 0 + 0.7551020408

Combine like terms: -0.7551020408 + 0.7551020408 = 0.0000000000
0.0000000000 + -1.846938776t + t2 = 0 + 0.7551020408
-1.846938776t + t2 = 0 + 0.7551020408

Combine like terms: 0 + 0.7551020408 = 0.7551020408
-1.846938776t + t2 = 0.7551020408

The t term is -1.846938776t.  Take half its coefficient (-0.923469388).
Square it (0.8527957106) and add it to both sides.

Add '0.8527957106' to each side of the equation.
-1.846938776t + 0.8527957106 + t2 = 0.7551020408 + 0.8527957106

Reorder the terms:
0.8527957106 + -1.846938776t + t2 = 0.7551020408 + 0.8527957106

Combine like terms: 0.7551020408 + 0.8527957106 = 1.6078977514
0.8527957106 + -1.846938776t + t2 = 1.6078977514

Factor a perfect square on the left side:
(t + -0.923469388)(t + -0.923469388) = 1.6078977514

Calculate the square root of the right side: 1.268029081

Break this problem into two subproblems by setting 
(t + -0.923469388) equal to 1.268029081 and -1.268029081.

Subproblem 1

t + -0.923469388 = 1.268029081 Simplifying t + -0.923469388 = 1.268029081 Reorder the terms: -0.923469388 + t = 1.268029081 Solving -0.923469388 + t = 1.268029081 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.923469388' to each side of the equation. -0.923469388 + 0.923469388 + t = 1.268029081 + 0.923469388 Combine like terms: -0.923469388 + 0.923469388 = 0.000000000 0.000000000 + t = 1.268029081 + 0.923469388 t = 1.268029081 + 0.923469388 Combine like terms: 1.268029081 + 0.923469388 = 2.191498469 t = 2.191498469 Simplifying t = 2.191498469

Subproblem 2

t + -0.923469388 = -1.268029081 Simplifying t + -0.923469388 = -1.268029081 Reorder the terms: -0.923469388 + t = -1.268029081 Solving -0.923469388 + t = -1.268029081 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.923469388' to each side of the equation. -0.923469388 + 0.923469388 + t = -1.268029081 + 0.923469388 Combine like terms: -0.923469388 + 0.923469388 = 0.000000000 0.000000000 + t = -1.268029081 + 0.923469388 t = -1.268029081 + 0.923469388 Combine like terms: -1.268029081 + 0.923469388 = -0.344559693 t = -0.344559693 Simplifying t = -0.344559693

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.191498469, -0.344559693}

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