t=-16t^2+70t+4

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Solution for t=-16t^2+70t+4 equation:


Simplifying
t = -16t2 + 70t + 4

Reorder the terms:
t = 4 + 70t + -16t2

Solving
t = 4 + 70t + -16t2

Solving for variable 't'.

Reorder the terms:
-4 + t + -70t + 16t2 = 4 + 70t + -16t2 + -4 + -70t + 16t2

Combine like terms: t + -70t = -69t
-4 + -69t + 16t2 = 4 + 70t + -16t2 + -4 + -70t + 16t2

Reorder the terms:
-4 + -69t + 16t2 = 4 + -4 + 70t + -70t + -16t2 + 16t2

Combine like terms: 4 + -4 = 0
-4 + -69t + 16t2 = 0 + 70t + -70t + -16t2 + 16t2
-4 + -69t + 16t2 = 70t + -70t + -16t2 + 16t2

Combine like terms: 70t + -70t = 0
-4 + -69t + 16t2 = 0 + -16t2 + 16t2
-4 + -69t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-4 + -69t + 16t2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
-0.25 + -4.3125t + t2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -4.3125t + 0.25 + t2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -4.3125t + t2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -4.3125t + t2 = 0 + 0.25
-4.3125t + t2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-4.3125t + t2 = 0.25

The t term is -4.3125t.  Take half its coefficient (-2.15625).
Square it (4.649414063) and add it to both sides.

Add '4.649414063' to each side of the equation.
-4.3125t + 4.649414063 + t2 = 0.25 + 4.649414063

Reorder the terms:
4.649414063 + -4.3125t + t2 = 0.25 + 4.649414063

Combine like terms: 0.25 + 4.649414063 = 4.899414063
4.649414063 + -4.3125t + t2 = 4.899414063

Factor a perfect square on the left side:
(t + -2.15625)(t + -2.15625) = 4.899414063

Calculate the square root of the right side: 2.213462008

Break this problem into two subproblems by setting 
(t + -2.15625) equal to 2.213462008 and -2.213462008.

Subproblem 1

t + -2.15625 = 2.213462008 Simplifying t + -2.15625 = 2.213462008 Reorder the terms: -2.15625 + t = 2.213462008 Solving -2.15625 + t = 2.213462008 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.15625' to each side of the equation. -2.15625 + 2.15625 + t = 2.213462008 + 2.15625 Combine like terms: -2.15625 + 2.15625 = 0.00000 0.00000 + t = 2.213462008 + 2.15625 t = 2.213462008 + 2.15625 Combine like terms: 2.213462008 + 2.15625 = 4.369712008 t = 4.369712008 Simplifying t = 4.369712008

Subproblem 2

t + -2.15625 = -2.213462008 Simplifying t + -2.15625 = -2.213462008 Reorder the terms: -2.15625 + t = -2.213462008 Solving -2.15625 + t = -2.213462008 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.15625' to each side of the equation. -2.15625 + 2.15625 + t = -2.213462008 + 2.15625 Combine like terms: -2.15625 + 2.15625 = 0.00000 0.00000 + t = -2.213462008 + 2.15625 t = -2.213462008 + 2.15625 Combine like terms: -2.213462008 + 2.15625 = -0.057212008 t = -0.057212008 Simplifying t = -0.057212008

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.369712008, -0.057212008}

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