294=4.9t^2+34.3t

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Solution for 294=4.9t^2+34.3t equation:


Simplifying
294 = 4.9t2 + 34.3t

Reorder the terms:
294 = 34.3t + 4.9t2

Solving
294 = 34.3t + 4.9t2

Solving for variable 't'.

Reorder the terms:
294 + -34.3t + -4.9t2 = 34.3t + -34.3t + 4.9t2 + -4.9t2

Combine like terms: 34.3t + -34.3t = 0.0
294 + -34.3t + -4.9t2 = 0.0 + 4.9t2 + -4.9t2
294 + -34.3t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
294 + -34.3t + -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'.
-60 + 7t + t2 = 0

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + 7t + 60 + t2 = 0 + 60

Reorder the terms:
-60 + 60 + 7t + t2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + 7t + t2 = 0 + 60
7t + t2 = 0 + 60

Combine like terms: 0 + 60 = 60
7t + t2 = 60

The t term is 7t.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7t + 12.25 + t2 = 60 + 12.25

Reorder the terms:
12.25 + 7t + t2 = 60 + 12.25

Combine like terms: 60 + 12.25 = 72.25
12.25 + 7t + t2 = 72.25

Factor a perfect square on the left side:
(t + 3.5)(t + 3.5) = 72.25

Calculate the square root of the right side: 8.5

Break this problem into two subproblems by setting 
(t + 3.5) equal to 8.5 and -8.5.

Subproblem 1

t + 3.5 = 8.5 Simplifying t + 3.5 = 8.5 Reorder the terms: 3.5 + t = 8.5 Solving 3.5 + t = 8.5 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + t = 8.5 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + t = 8.5 + -3.5 t = 8.5 + -3.5 Combine like terms: 8.5 + -3.5 = 5 t = 5 Simplifying t = 5

Subproblem 2

t + 3.5 = -8.5 Simplifying t + 3.5 = -8.5 Reorder the terms: 3.5 + t = -8.5 Solving 3.5 + t = -8.5 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + t = -8.5 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + t = -8.5 + -3.5 t = -8.5 + -3.5 Combine like terms: -8.5 + -3.5 = -12 t = -12 Simplifying t = -12

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5, -12}

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