4.9t^2-14t+5=0

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Solution for 4.9t^2-14t+5=0 equation:


Simplifying
4.9t2 + -14t + 5 = 0

Reorder the terms:
5 + -14t + 4.9t2 = 0

Solving
5 + -14t + 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'.
1.020408163 + -2.857142857t + t2 = 0

Move the constant term to the right:

Add '-1.020408163' to each side of the equation.
1.020408163 + -2.857142857t + -1.020408163 + t2 = 0 + -1.020408163

Reorder the terms:
1.020408163 + -1.020408163 + -2.857142857t + t2 = 0 + -1.020408163

Combine like terms: 1.020408163 + -1.020408163 = 0.000000000
0.000000000 + -2.857142857t + t2 = 0 + -1.020408163
-2.857142857t + t2 = 0 + -1.020408163

Combine like terms: 0 + -1.020408163 = -1.020408163
-2.857142857t + t2 = -1.020408163

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 = -1.020408163 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857t + t2 = -1.020408163 + 2.040816328

Combine like terms: -1.020408163 + 2.040816328 = 1.020408165
2.040816328 + -2.857142857t + t2 = 1.020408165

Factor a perfect square on the left side:
(t + -1.428571429)(t + -1.428571429) = 1.020408165

Calculate the square root of the right side: 1.010152545

Break this problem into two subproblems by setting 
(t + -1.428571429) equal to 1.010152545 and -1.010152545.

Subproblem 1

t + -1.428571429 = 1.010152545 Simplifying t + -1.428571429 = 1.010152545 Reorder the terms: -1.428571429 + t = 1.010152545 Solving -1.428571429 + t = 1.010152545 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 = 1.010152545 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = 1.010152545 + 1.428571429 t = 1.010152545 + 1.428571429 Combine like terms: 1.010152545 + 1.428571429 = 2.438723974 t = 2.438723974 Simplifying t = 2.438723974

Subproblem 2

t + -1.428571429 = -1.010152545 Simplifying t + -1.428571429 = -1.010152545 Reorder the terms: -1.428571429 + t = -1.010152545 Solving -1.428571429 + t = -1.010152545 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 = -1.010152545 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + t = -1.010152545 + 1.428571429 t = -1.010152545 + 1.428571429 Combine like terms: -1.010152545 + 1.428571429 = 0.418418884 t = 0.418418884 Simplifying t = 0.418418884

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.438723974, 0.418418884}

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