35=0+7.5t+4.9t^2

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Solution for 35=0+7.5t+4.9t^2 equation:


Simplifying
35 = 0 + 7.5t + 4.9t2
Remove the zero:
35 = 7.5t + 4.9t2

Solving
35 = 7.5t + 4.9t2

Solving for variable 't'.

Reorder the terms:
35 + -7.5t + -4.9t2 = 7.5t + -7.5t + 4.9t2 + -4.9t2

Combine like terms: 7.5t + -7.5t = 0.0
35 + -7.5t + -4.9t2 = 0.0 + 4.9t2 + -4.9t2
35 + -7.5t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
35 + -7.5t + -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'.
-7.142857143 + 1.530612245t + t2 = 0

Move the constant term to the right:

Add '7.142857143' to each side of the equation.
-7.142857143 + 1.530612245t + 7.142857143 + t2 = 0 + 7.142857143

Reorder the terms:
-7.142857143 + 7.142857143 + 1.530612245t + t2 = 0 + 7.142857143

Combine like terms: -7.142857143 + 7.142857143 = 0.000000000
0.000000000 + 1.530612245t + t2 = 0 + 7.142857143
1.530612245t + t2 = 0 + 7.142857143

Combine like terms: 0 + 7.142857143 = 7.142857143
1.530612245t + t2 = 7.142857143

The t term is 1.530612245t.  Take half its coefficient (0.7653061225).
Square it (0.5856934611) and add it to both sides.

Add '0.5856934611' to each side of the equation.
1.530612245t + 0.5856934611 + t2 = 7.142857143 + 0.5856934611

Reorder the terms:
0.5856934611 + 1.530612245t + t2 = 7.142857143 + 0.5856934611

Combine like terms: 7.142857143 + 0.5856934611 = 7.7285506041
0.5856934611 + 1.530612245t + t2 = 7.7285506041

Factor a perfect square on the left side:
(t + 0.7653061225)(t + 0.7653061225) = 7.7285506041

Calculate the square root of the right side: 2.780027087

Break this problem into two subproblems by setting 
(t + 0.7653061225) equal to 2.780027087 and -2.780027087.

Subproblem 1

t + 0.7653061225 = 2.780027087 Simplifying t + 0.7653061225 = 2.780027087 Reorder the terms: 0.7653061225 + t = 2.780027087 Solving 0.7653061225 + t = 2.780027087 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.7653061225' to each side of the equation. 0.7653061225 + -0.7653061225 + t = 2.780027087 + -0.7653061225 Combine like terms: 0.7653061225 + -0.7653061225 = 0.0000000000 0.0000000000 + t = 2.780027087 + -0.7653061225 t = 2.780027087 + -0.7653061225 Combine like terms: 2.780027087 + -0.7653061225 = 2.0147209645 t = 2.0147209645 Simplifying t = 2.0147209645

Subproblem 2

t + 0.7653061225 = -2.780027087 Simplifying t + 0.7653061225 = -2.780027087 Reorder the terms: 0.7653061225 + t = -2.780027087 Solving 0.7653061225 + t = -2.780027087 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.7653061225' to each side of the equation. 0.7653061225 + -0.7653061225 + t = -2.780027087 + -0.7653061225 Combine like terms: 0.7653061225 + -0.7653061225 = 0.0000000000 0.0000000000 + t = -2.780027087 + -0.7653061225 t = -2.780027087 + -0.7653061225 Combine like terms: -2.780027087 + -0.7653061225 = -3.5453332095 t = -3.5453332095 Simplifying t = -3.5453332095

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.0147209645, -3.5453332095}

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