73.5=9.8t+49t^2

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Solution for 73.5=9.8t+49t^2 equation:


Simplifying
73.5 = 9.8t + 49t2

Solving
73.5 = 9.8t + 49t2

Solving for variable 't'.

Reorder the terms:
73.5 + -9.8t + -49t2 = 9.8t + -9.8t + 49t2 + -49t2

Combine like terms: 9.8t + -9.8t = 0.0
73.5 + -9.8t + -49t2 = 0.0 + 49t2 + -49t2
73.5 + -9.8t + -49t2 = 49t2 + -49t2

Combine like terms: 49t2 + -49t2 = 0
73.5 + -9.8t + -49t2 = 0

Begin completing the square.  Divide all terms by
-49 the coefficient of the squared term: 

Divide each side by '-49'.
-1.5 + 0.2t + t2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 0.2t + 1.5 + t2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 0.2t + t2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 0.2t + t2 = 0 + 1.5
0.2t + t2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
0.2t + t2 = 1.5

The t term is 0.2t.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2t + 0.01 + t2 = 1.5 + 0.01

Reorder the terms:
0.01 + 0.2t + t2 = 1.5 + 0.01

Combine like terms: 1.5 + 0.01 = 1.51
0.01 + 0.2t + t2 = 1.51

Factor a perfect square on the left side:
(t + 0.1)(t + 0.1) = 1.51

Calculate the square root of the right side: 1.228820573

Break this problem into two subproblems by setting 
(t + 0.1) equal to 1.228820573 and -1.228820573.

Subproblem 1

t + 0.1 = 1.228820573 Simplifying t + 0.1 = 1.228820573 Reorder the terms: 0.1 + t = 1.228820573 Solving 0.1 + t = 1.228820573 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + t = 1.228820573 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + t = 1.228820573 + -0.1 t = 1.228820573 + -0.1 Combine like terms: 1.228820573 + -0.1 = 1.128820573 t = 1.128820573 Simplifying t = 1.128820573

Subproblem 2

t + 0.1 = -1.228820573 Simplifying t + 0.1 = -1.228820573 Reorder the terms: 0.1 + t = -1.228820573 Solving 0.1 + t = -1.228820573 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + t = -1.228820573 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + t = -1.228820573 + -0.1 t = -1.228820573 + -0.1 Combine like terms: -1.228820573 + -0.1 = -1.328820573 t = -1.328820573 Simplifying t = -1.328820573

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.128820573, -1.328820573}

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