0=3.5t^2-24t-140

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Solution for 0=3.5t^2-24t-140 equation:


Simplifying
0 = 3.5t2 + -24t + -140

Reorder the terms:
0 = -140 + -24t + 3.5t2

Solving
0 = -140 + -24t + 3.5t2

Solving for variable 't'.

Combine like terms: 0 + 140 = 140
140 + 24t + -3.5t2 = -140 + -24t + 3.5t2 + 140 + 24t + -3.5t2

Reorder the terms:
140 + 24t + -3.5t2 = -140 + 140 + -24t + 24t + 3.5t2 + -3.5t2

Combine like terms: -140 + 140 = 0
140 + 24t + -3.5t2 = 0 + -24t + 24t + 3.5t2 + -3.5t2
140 + 24t + -3.5t2 = -24t + 24t + 3.5t2 + -3.5t2

Combine like terms: -24t + 24t = 0
140 + 24t + -3.5t2 = 0 + 3.5t2 + -3.5t2
140 + 24t + -3.5t2 = 3.5t2 + -3.5t2

Combine like terms: 3.5t2 + -3.5t2 = 0.0
140 + 24t + -3.5t2 = 0.0

Begin completing the square.  Divide all terms by
-3.5 the coefficient of the squared term: 

Divide each side by '-3.5'.
-40 + -6.857142857t + t2 = 0

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + -6.857142857t + 40 + t2 = 0 + 40

Reorder the terms:
-40 + 40 + -6.857142857t + t2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -6.857142857t + t2 = 0 + 40
-6.857142857t + t2 = 0 + 40

Combine like terms: 0 + 40 = 40
-6.857142857t + t2 = 40

The t term is -6.857142857t.  Take half its coefficient (-3.428571429).
Square it (11.75510204) and add it to both sides.

Add '11.75510204' to each side of the equation.
-6.857142857t + 11.75510204 + t2 = 40 + 11.75510204

Reorder the terms:
11.75510204 + -6.857142857t + t2 = 40 + 11.75510204

Combine like terms: 40 + 11.75510204 = 51.75510204
11.75510204 + -6.857142857t + t2 = 51.75510204

Factor a perfect square on the left side:
(t + -3.428571429)(t + -3.428571429) = 51.75510204

Calculate the square root of the right side: 7.194101893

Break this problem into two subproblems by setting 
(t + -3.428571429) equal to 7.194101893 and -7.194101893.

Subproblem 1

t + -3.428571429 = 7.194101893 Simplifying t + -3.428571429 = 7.194101893 Reorder the terms: -3.428571429 + t = 7.194101893 Solving -3.428571429 + t = 7.194101893 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + t = 7.194101893 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = 7.194101893 + 3.428571429 t = 7.194101893 + 3.428571429 Combine like terms: 7.194101893 + 3.428571429 = 10.622673322 t = 10.622673322 Simplifying t = 10.622673322

Subproblem 2

t + -3.428571429 = -7.194101893 Simplifying t + -3.428571429 = -7.194101893 Reorder the terms: -3.428571429 + t = -7.194101893 Solving -3.428571429 + t = -7.194101893 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + t = -7.194101893 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + t = -7.194101893 + 3.428571429 t = -7.194101893 + 3.428571429 Combine like terms: -7.194101893 + 3.428571429 = -3.765530464 t = -3.765530464 Simplifying t = -3.765530464

Solution

The solution to the problem is based on the solutions from the subproblems. t = {10.622673322, -3.765530464}

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