0=4.9t^2-14t+10

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Solution for 0=4.9t^2-14t+10 equation:


Simplifying
0 = 4.9t2 + -14t + 10

Reorder the terms:
0 = 10 + -14t + 4.9t2

Solving
0 = 10 + -14t + 4.9t2

Solving for variable 't'.

Combine like terms: 0 + -10 = -10
-10 + 14t + -4.9t2 = 10 + -14t + 4.9t2 + -10 + 14t + -4.9t2

Reorder the terms:
-10 + 14t + -4.9t2 = 10 + -10 + -14t + 14t + 4.9t2 + -4.9t2

Combine like terms: 10 + -10 = 0
-10 + 14t + -4.9t2 = 0 + -14t + 14t + 4.9t2 + -4.9t2
-10 + 14t + -4.9t2 = -14t + 14t + 4.9t2 + -4.9t2

Combine like terms: -14t + 14t = 0
-10 + 14t + -4.9t2 = 0 + 4.9t2 + -4.9t2
-10 + 14t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
-10 + 14t + -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 + -2.857142857t + t2 = 0

Move the constant term to the right:

Add '-2.040816327' to each side of the equation.
2.040816327 + -2.857142857t + -2.040816327 + t2 = 0 + -2.040816327

Reorder the terms:
2.040816327 + -2.040816327 + -2.857142857t + t2 = 0 + -2.040816327

Combine like terms: 2.040816327 + -2.040816327 = 0.000000000
0.000000000 + -2.857142857t + t2 = 0 + -2.040816327
-2.857142857t + t2 = 0 + -2.040816327

Combine like terms: 0 + -2.040816327 = -2.040816327
-2.857142857t + t2 = -2.040816327

The t term is -2.857142857t.  Take half its coefficient (-1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
-2.857142857t + 2.040816328 + t2 = -2.040816327 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857t + t2 = -2.040816327 + 2.040816328

Combine like terms: -2.040816327 + 2.040816328 = 0.000000001
2.040816328 + -2.857142857t + t2 = 0.000000001

Factor a perfect square on the left side:
(t + -1.428571429)(t + -1.428571429) = 0.000000001

Calculate the square root of the right side: 0.000031623

Break this problem into two subproblems by setting 
(t + -1.428571429) equal to 0.000031623 and -0.000031623.

Subproblem 1

t + -1.428571429 = 0.000031623 Simplifying t + -1.428571429 = 0.000031623 Reorder the terms: -1.428571429 + t = 0.000031623 Solving -1.428571429 + t = 0.000031623 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = 0.000031623 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = 0.000031623 + 1.428571429 t = 0.000031623 + 1.428571429 Combine like terms: 0.000031623 + 1.428571429 = 1.428603052 t = 1.428603052 Simplifying t = 1.428603052

Subproblem 2

t + -1.428571429 = -0.000031623 Simplifying t + -1.428571429 = -0.000031623 Reorder the terms: -1.428571429 + t = -0.000031623 Solving -1.428571429 + t = -0.000031623 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + t = -0.000031623 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = -0.000031623 + 1.428571429 t = -0.000031623 + 1.428571429 Combine like terms: -0.000031623 + 1.428571429 = 1.428539806 t = 1.428539806 Simplifying t = 1.428539806

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.428603052, 1.428539806}

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