4.9t^2-10t-92=0

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Solution for 4.9t^2-10t-92=0 equation:


Simplifying
4.9t2 + -10t + -92 = 0

Reorder the terms:
-92 + -10t + 4.9t2 = 0

Solving
-92 + -10t + 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'.
-18.7755102 + -2.040816327t + t2 = 0

Move the constant term to the right:

Add '18.7755102' to each side of the equation.
-18.7755102 + -2.040816327t + 18.7755102 + t2 = 0 + 18.7755102

Reorder the terms:
-18.7755102 + 18.7755102 + -2.040816327t + t2 = 0 + 18.7755102

Combine like terms: -18.7755102 + 18.7755102 = 0.0000000
0.0000000 + -2.040816327t + t2 = 0 + 18.7755102
-2.040816327t + t2 = 0 + 18.7755102

Combine like terms: 0 + 18.7755102 = 18.7755102
-2.040816327t + t2 = 18.7755102

The t term is -2.040816327t.  Take half its coefficient (-1.020408164).
Square it (1.041232821) and add it to both sides.

Add '1.041232821' to each side of the equation.
-2.040816327t + 1.041232821 + t2 = 18.7755102 + 1.041232821

Reorder the terms:
1.041232821 + -2.040816327t + t2 = 18.7755102 + 1.041232821

Combine like terms: 18.7755102 + 1.041232821 = 19.816743021
1.041232821 + -2.040816327t + t2 = 19.816743021

Factor a perfect square on the left side:
(t + -1.020408164)(t + -1.020408164) = 19.816743021

Calculate the square root of the right side: 4.451600052

Break this problem into two subproblems by setting 
(t + -1.020408164) equal to 4.451600052 and -4.451600052.

Subproblem 1

t + -1.020408164 = 4.451600052 Simplifying t + -1.020408164 = 4.451600052 Reorder the terms: -1.020408164 + t = 4.451600052 Solving -1.020408164 + t = 4.451600052 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = 4.451600052 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = 4.451600052 + 1.020408164 t = 4.451600052 + 1.020408164 Combine like terms: 4.451600052 + 1.020408164 = 5.472008216 t = 5.472008216 Simplifying t = 5.472008216

Subproblem 2

t + -1.020408164 = -4.451600052 Simplifying t + -1.020408164 = -4.451600052 Reorder the terms: -1.020408164 + t = -4.451600052 Solving -1.020408164 + t = -4.451600052 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = -4.451600052 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = -4.451600052 + 1.020408164 t = -4.451600052 + 1.020408164 Combine like terms: -4.451600052 + 1.020408164 = -3.431191888 t = -3.431191888 Simplifying t = -3.431191888

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.472008216, -3.431191888}

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