0=-4.9t^2+12.7t+6

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Solution for 0=-4.9t^2+12.7t+6 equation:


Simplifying
0 = -4.9t2 + 12.7t + 6

Reorder the terms:
0 = 6 + 12.7t + -4.9t2

Solving
0 = 6 + 12.7t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -6 = -6
-6 + -12.7t + 4.9t2 = 6 + 12.7t + -4.9t2 + -6 + -12.7t + 4.9t2

Reorder the terms:
-6 + -12.7t + 4.9t2 = 6 + -6 + 12.7t + -12.7t + -4.9t2 + 4.9t2

Combine like terms: 6 + -6 = 0
-6 + -12.7t + 4.9t2 = 0 + 12.7t + -12.7t + -4.9t2 + 4.9t2
-6 + -12.7t + 4.9t2 = 12.7t + -12.7t + -4.9t2 + 4.9t2

Combine like terms: 12.7t + -12.7t = 0.0
-6 + -12.7t + 4.9t2 = 0.0 + -4.9t2 + 4.9t2
-6 + -12.7t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-6 + -12.7t + 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'.
-1.224489796 + -2.591836735t + t2 = 0

Move the constant term to the right:

Add '1.224489796' to each side of the equation.
-1.224489796 + -2.591836735t + 1.224489796 + t2 = 0 + 1.224489796

Reorder the terms:
-1.224489796 + 1.224489796 + -2.591836735t + t2 = 0 + 1.224489796

Combine like terms: -1.224489796 + 1.224489796 = 0.000000000
0.000000000 + -2.591836735t + t2 = 0 + 1.224489796
-2.591836735t + t2 = 0 + 1.224489796

Combine like terms: 0 + 1.224489796 = 1.224489796
-2.591836735t + t2 = 1.224489796

The t term is -2.591836735t.  Take half its coefficient (-1.295918368).
Square it (1.679404417) and add it to both sides.

Add '1.679404417' to each side of the equation.
-2.591836735t + 1.679404417 + t2 = 1.224489796 + 1.679404417

Reorder the terms:
1.679404417 + -2.591836735t + t2 = 1.224489796 + 1.679404417

Combine like terms: 1.224489796 + 1.679404417 = 2.903894213
1.679404417 + -2.591836735t + t2 = 2.903894213

Factor a perfect square on the left side:
(t + -1.295918368)(t + -1.295918368) = 2.903894213

Calculate the square root of the right side: 1.704081633

Break this problem into two subproblems by setting 
(t + -1.295918368) equal to 1.704081633 and -1.704081633.

Subproblem 1

t + -1.295918368 = 1.704081633 Simplifying t + -1.295918368 = 1.704081633 Reorder the terms: -1.295918368 + t = 1.704081633 Solving -1.295918368 + t = 1.704081633 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.295918368' to each side of the equation. -1.295918368 + 1.295918368 + t = 1.704081633 + 1.295918368 Combine like terms: -1.295918368 + 1.295918368 = 0.000000000 0.000000000 + t = 1.704081633 + 1.295918368 t = 1.704081633 + 1.295918368 Combine like terms: 1.704081633 + 1.295918368 = 3.000000001 t = 3.000000001 Simplifying t = 3.000000001

Subproblem 2

t + -1.295918368 = -1.704081633 Simplifying t + -1.295918368 = -1.704081633 Reorder the terms: -1.295918368 + t = -1.704081633 Solving -1.295918368 + t = -1.704081633 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.295918368' to each side of the equation. -1.295918368 + 1.295918368 + t = -1.704081633 + 1.295918368 Combine like terms: -1.295918368 + 1.295918368 = 0.000000000 0.000000000 + t = -1.704081633 + 1.295918368 t = -1.704081633 + 1.295918368 Combine like terms: -1.704081633 + 1.295918368 = -0.408163265 t = -0.408163265 Simplifying t = -0.408163265

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.000000001, -0.408163265}

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