-4.9t^2+12t+10=0

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Solution for -4.9t^2+12t+10=0 equation:


Simplifying
-4.9t2 + 12t + 10 = 0

Reorder the terms:
10 + 12t + -4.9t2 = 0

Solving
10 + 12t + -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'.
-2.040816327 + -2.448979592t + t2 = 0

Move the constant term to the right:

Add '2.040816327' to each side of the equation.
-2.040816327 + -2.448979592t + 2.040816327 + t2 = 0 + 2.040816327

Reorder the terms:
-2.040816327 + 2.040816327 + -2.448979592t + t2 = 0 + 2.040816327

Combine like terms: -2.040816327 + 2.040816327 = 0.000000000
0.000000000 + -2.448979592t + t2 = 0 + 2.040816327
-2.448979592t + t2 = 0 + 2.040816327

Combine like terms: 0 + 2.040816327 = 2.040816327
-2.448979592t + t2 = 2.040816327

The t term is -2.448979592t.  Take half its coefficient (-1.224489796).
Square it (1.499375261) and add it to both sides.

Add '1.499375261' to each side of the equation.
-2.448979592t + 1.499375261 + t2 = 2.040816327 + 1.499375261

Reorder the terms:
1.499375261 + -2.448979592t + t2 = 2.040816327 + 1.499375261

Combine like terms: 2.040816327 + 1.499375261 = 3.540191588
1.499375261 + -2.448979592t + t2 = 3.540191588

Factor a perfect square on the left side:
(t + -1.224489796)(t + -1.224489796) = 3.540191588

Calculate the square root of the right side: 1.881539685

Break this problem into two subproblems by setting 
(t + -1.224489796) equal to 1.881539685 and -1.881539685.

Subproblem 1

t + -1.224489796 = 1.881539685 Simplifying t + -1.224489796 = 1.881539685 Reorder the terms: -1.224489796 + t = 1.881539685 Solving -1.224489796 + t = 1.881539685 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + t = 1.881539685 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = 1.881539685 + 1.224489796 t = 1.881539685 + 1.224489796 Combine like terms: 1.881539685 + 1.224489796 = 3.106029481 t = 3.106029481 Simplifying t = 3.106029481

Subproblem 2

t + -1.224489796 = -1.881539685 Simplifying t + -1.224489796 = -1.881539685 Reorder the terms: -1.224489796 + t = -1.881539685 Solving -1.224489796 + t = -1.881539685 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.224489796' to each side of the equation. -1.224489796 + 1.224489796 + t = -1.881539685 + 1.224489796 Combine like terms: -1.224489796 + 1.224489796 = 0.000000000 0.000000000 + t = -1.881539685 + 1.224489796 t = -1.881539685 + 1.224489796 Combine like terms: -1.881539685 + 1.224489796 = -0.657049889 t = -0.657049889 Simplifying t = -0.657049889

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.106029481, -0.657049889}

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