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

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


Simplifying
0 = -4.9t2 + 2t + 10

Reorder the terms:
0 = 10 + 2t + -4.9t2

Solving
0 = 10 + 2t + -4.9t2

Solving for variable 't'.

Combine like terms: 0 + -10 = -10
-10 + -2t + 4.9t2 = 10 + 2t + -4.9t2 + -10 + -2t + 4.9t2

Reorder the terms:
-10 + -2t + 4.9t2 = 10 + -10 + 2t + -2t + -4.9t2 + 4.9t2

Combine like terms: 10 + -10 = 0
-10 + -2t + 4.9t2 = 0 + 2t + -2t + -4.9t2 + 4.9t2
-10 + -2t + 4.9t2 = 2t + -2t + -4.9t2 + 4.9t2

Combine like terms: 2t + -2t = 0
-10 + -2t + 4.9t2 = 0 + -4.9t2 + 4.9t2
-10 + -2t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-10 + -2t + 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'.
-2.040816327 + -0.4081632653t + t2 = 0

Move the constant term to the right:

Add '2.040816327' to each side of the equation.
-2.040816327 + -0.4081632653t + 2.040816327 + t2 = 0 + 2.040816327

Reorder the terms:
-2.040816327 + 2.040816327 + -0.4081632653t + t2 = 0 + 2.040816327

Combine like terms: -2.040816327 + 2.040816327 = 0.000000000
0.000000000 + -0.4081632653t + t2 = 0 + 2.040816327
-0.4081632653t + t2 = 0 + 2.040816327

Combine like terms: 0 + 2.040816327 = 2.040816327
-0.4081632653t + t2 = 2.040816327

The t term is -0.4081632653t.  Take half its coefficient (-0.2040816327).
Square it (0.04164931281) and add it to both sides.

Add '0.04164931281' to each side of the equation.
-0.4081632653t + 0.04164931281 + t2 = 2.040816327 + 0.04164931281

Reorder the terms:
0.04164931281 + -0.4081632653t + t2 = 2.040816327 + 0.04164931281

Combine like terms: 2.040816327 + 0.04164931281 = 2.08246563981
0.04164931281 + -0.4081632653t + t2 = 2.08246563981

Factor a perfect square on the left side:
(t + -0.2040816327)(t + -0.2040816327) = 2.08246563981

Calculate the square root of the right side: 1.443075064

Break this problem into two subproblems by setting 
(t + -0.2040816327) equal to 1.443075064 and -1.443075064.

Subproblem 1

t + -0.2040816327 = 1.443075064 Simplifying t + -0.2040816327 = 1.443075064 Reorder the terms: -0.2040816327 + t = 1.443075064 Solving -0.2040816327 + t = 1.443075064 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2040816327' to each side of the equation. -0.2040816327 + 0.2040816327 + t = 1.443075064 + 0.2040816327 Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000 0.0000000000 + t = 1.443075064 + 0.2040816327 t = 1.443075064 + 0.2040816327 Combine like terms: 1.443075064 + 0.2040816327 = 1.6471566967 t = 1.6471566967 Simplifying t = 1.6471566967

Subproblem 2

t + -0.2040816327 = -1.443075064 Simplifying t + -0.2040816327 = -1.443075064 Reorder the terms: -0.2040816327 + t = -1.443075064 Solving -0.2040816327 + t = -1.443075064 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2040816327' to each side of the equation. -0.2040816327 + 0.2040816327 + t = -1.443075064 + 0.2040816327 Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000 0.0000000000 + t = -1.443075064 + 0.2040816327 t = -1.443075064 + 0.2040816327 Combine like terms: -1.443075064 + 0.2040816327 = -1.2389934313 t = -1.2389934313 Simplifying t = -1.2389934313

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.6471566967, -1.2389934313}

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