t=-4.9t^2+0t+70

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Solution for t=-4.9t^2+0t+70 equation:


Simplifying
t = -4.9t2 + 0t + 70

Anything times zero is zero.
t = -4.9t2 + 0t + 70

Reorder the terms:
t = 0 + 70 + -4.9t2

Combine like terms: 0 + 70 = 70
t = 70 + -4.9t2

Solving
t = 70 + -4.9t2

Solving for variable 't'.

Reorder the terms:
-70 + t + 4.9t2 = 70 + -4.9t2 + -70 + 4.9t2

Reorder the terms:
-70 + t + 4.9t2 = 70 + -70 + -4.9t2 + 4.9t2

Combine like terms: 70 + -70 = 0
-70 + t + 4.9t2 = 0 + -4.9t2 + 4.9t2
-70 + t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-70 + t + 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'.
-14.28571429 + 0.2040816327t + t2 = 0

Move the constant term to the right:

Add '14.28571429' to each side of the equation.
-14.28571429 + 0.2040816327t + 14.28571429 + t2 = 0 + 14.28571429

Reorder the terms:
-14.28571429 + 14.28571429 + 0.2040816327t + t2 = 0 + 14.28571429

Combine like terms: -14.28571429 + 14.28571429 = 0.00000000
0.00000000 + 0.2040816327t + t2 = 0 + 14.28571429
0.2040816327t + t2 = 0 + 14.28571429

Combine like terms: 0 + 14.28571429 = 14.28571429
0.2040816327t + t2 = 14.28571429

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.2040816327t + 0.25 + t2 = 14.28571429 + 0.25

Reorder the terms:
0.25 + 0.2040816327t + t2 = 14.28571429 + 0.25

Combine like terms: 14.28571429 + 0.25 = 14.53571429
0.25 + 0.2040816327t + t2 = 14.53571429

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 14.53571429

Calculate the square root of the right side: 3.812573185

Break this problem into two subproblems by setting 
(t + 0.5) equal to 3.812573185 and -3.812573185.

Subproblem 1

t + 0.5 = 3.812573185 Simplifying t + 0.5 = 3.812573185 Reorder the terms: 0.5 + t = 3.812573185 Solving 0.5 + t = 3.812573185 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 3.812573185 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 3.812573185 + -0.5 t = 3.812573185 + -0.5 Combine like terms: 3.812573185 + -0.5 = 3.312573185 t = 3.312573185 Simplifying t = 3.312573185

Subproblem 2

t + 0.5 = -3.812573185 Simplifying t + 0.5 = -3.812573185 Reorder the terms: 0.5 + t = -3.812573185 Solving 0.5 + t = -3.812573185 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -3.812573185 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -3.812573185 + -0.5 t = -3.812573185 + -0.5 Combine like terms: -3.812573185 + -0.5 = -4.312573185 t = -4.312573185 Simplifying t = -4.312573185

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.312573185, -4.312573185}

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