4.9t^2-5.2t-38=0

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Solution for 4.9t^2-5.2t-38=0 equation:


Simplifying
4.9t2 + -5.2t + -38 = 0

Reorder the terms:
-38 + -5.2t + 4.9t2 = 0

Solving
-38 + -5.2t + 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'.
-7.755102041 + -1.06122449t + t2 = 0

Move the constant term to the right:

Add '7.755102041' to each side of the equation.
-7.755102041 + -1.06122449t + 7.755102041 + t2 = 0 + 7.755102041

Reorder the terms:
-7.755102041 + 7.755102041 + -1.06122449t + t2 = 0 + 7.755102041

Combine like terms: -7.755102041 + 7.755102041 = 0.000000000
0.000000000 + -1.06122449t + t2 = 0 + 7.755102041
-1.06122449t + t2 = 0 + 7.755102041

Combine like terms: 0 + 7.755102041 = 7.755102041
-1.06122449t + t2 = 7.755102041

The t term is -1.06122449t.  Take half its coefficient (-0.530612245).
Square it (0.2815493545) and add it to both sides.

Add '0.2815493545' to each side of the equation.
-1.06122449t + 0.2815493545 + t2 = 7.755102041 + 0.2815493545

Reorder the terms:
0.2815493545 + -1.06122449t + t2 = 7.755102041 + 0.2815493545

Combine like terms: 7.755102041 + 0.2815493545 = 8.0366513955
0.2815493545 + -1.06122449t + t2 = 8.0366513955

Factor a perfect square on the left side:
(t + -0.530612245)(t + -0.530612245) = 8.0366513955

Calculate the square root of the right side: 2.834898833

Break this problem into two subproblems by setting 
(t + -0.530612245) equal to 2.834898833 and -2.834898833.

Subproblem 1

t + -0.530612245 = 2.834898833 Simplifying t + -0.530612245 = 2.834898833 Reorder the terms: -0.530612245 + t = 2.834898833 Solving -0.530612245 + t = 2.834898833 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.530612245' to each side of the equation. -0.530612245 + 0.530612245 + t = 2.834898833 + 0.530612245 Combine like terms: -0.530612245 + 0.530612245 = 0.000000000 0.000000000 + t = 2.834898833 + 0.530612245 t = 2.834898833 + 0.530612245 Combine like terms: 2.834898833 + 0.530612245 = 3.365511078 t = 3.365511078 Simplifying t = 3.365511078

Subproblem 2

t + -0.530612245 = -2.834898833 Simplifying t + -0.530612245 = -2.834898833 Reorder the terms: -0.530612245 + t = -2.834898833 Solving -0.530612245 + t = -2.834898833 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.530612245' to each side of the equation. -0.530612245 + 0.530612245 + t = -2.834898833 + 0.530612245 Combine like terms: -0.530612245 + 0.530612245 = 0.000000000 0.000000000 + t = -2.834898833 + 0.530612245 t = -2.834898833 + 0.530612245 Combine like terms: -2.834898833 + 0.530612245 = -2.304286588 t = -2.304286588 Simplifying t = -2.304286588

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.365511078, -2.304286588}

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