4.9t^2+7t-500=0

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Solution for 4.9t^2+7t-500=0 equation:


Simplifying
4.9t2 + 7t + -500 = 0

Reorder the terms:
-500 + 7t + 4.9t2 = 0

Solving
-500 + 7t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
-102.0408163 + 1.428571429t + t2 = 0

Move the constant term to the right:

Add '102.0408163' to each side of the equation.
-102.0408163 + 1.428571429t + 102.0408163 + t2 = 0 + 102.0408163

Reorder the terms:
-102.0408163 + 102.0408163 + 1.428571429t + t2 = 0 + 102.0408163

Combine like terms: -102.0408163 + 102.0408163 = 0.0000000
0.0000000 + 1.428571429t + t2 = 0 + 102.0408163
1.428571429t + t2 = 0 + 102.0408163

Combine like terms: 0 + 102.0408163 = 102.0408163
1.428571429t + t2 = 102.0408163

The t term is 1.428571429t.  Take half its coefficient (0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
1.428571429t + 0.5102040819 + t2 = 102.0408163 + 0.5102040819

Reorder the terms:
0.5102040819 + 1.428571429t + t2 = 102.0408163 + 0.5102040819

Combine like terms: 102.0408163 + 0.5102040819 = 102.5510203819
0.5102040819 + 1.428571429t + t2 = 102.5510203819

Factor a perfect square on the left side:
(t + 0.7142857145)(t + 0.7142857145) = 102.5510203819

Calculate the square root of the right side: 10.126747769

Break this problem into two subproblems by setting 
(t + 0.7142857145) equal to 10.126747769 and -10.126747769.

Subproblem 1

t + 0.7142857145 = 10.126747769 Simplifying t + 0.7142857145 = 10.126747769 Reorder the terms: 0.7142857145 + t = 10.126747769 Solving 0.7142857145 + t = 10.126747769 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.7142857145' to each side of the equation. 0.7142857145 + -0.7142857145 + t = 10.126747769 + -0.7142857145 Combine like terms: 0.7142857145 + -0.7142857145 = 0.0000000000 0.0000000000 + t = 10.126747769 + -0.7142857145 t = 10.126747769 + -0.7142857145 Combine like terms: 10.126747769 + -0.7142857145 = 9.4124620545 t = 9.4124620545 Simplifying t = 9.4124620545

Subproblem 2

t + 0.7142857145 = -10.126747769 Simplifying t + 0.7142857145 = -10.126747769 Reorder the terms: 0.7142857145 + t = -10.126747769 Solving 0.7142857145 + t = -10.126747769 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.7142857145' to each side of the equation. 0.7142857145 + -0.7142857145 + t = -10.126747769 + -0.7142857145 Combine like terms: 0.7142857145 + -0.7142857145 = 0.0000000000 0.0000000000 + t = -10.126747769 + -0.7142857145 t = -10.126747769 + -0.7142857145 Combine like terms: -10.126747769 + -0.7142857145 = -10.8410334835 t = -10.8410334835 Simplifying t = -10.8410334835

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9.4124620545, -10.8410334835}

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