1.1=-4.9t^2+7t

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Solution for 1.1=-4.9t^2+7t equation:


Simplifying
1.1 = -4.9t2 + 7t

Reorder the terms:
1.1 = 7t + -4.9t2

Solving
1.1 = 7t + -4.9t2

Solving for variable 't'.

Reorder the terms:
1.1 + -7t + 4.9t2 = 7t + -7t + -4.9t2 + 4.9t2

Combine like terms: 7t + -7t = 0
1.1 + -7t + 4.9t2 = 0 + -4.9t2 + 4.9t2
1.1 + -7t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
1.1 + -7t + 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'.
0.2244897959 + -1.428571429t + t2 = 0

Move the constant term to the right:

Add '-0.2244897959' to each side of the equation.
0.2244897959 + -1.428571429t + -0.2244897959 + t2 = 0 + -0.2244897959

Reorder the terms:
0.2244897959 + -0.2244897959 + -1.428571429t + t2 = 0 + -0.2244897959

Combine like terms: 0.2244897959 + -0.2244897959 = 0.0000000000
0.0000000000 + -1.428571429t + t2 = 0 + -0.2244897959
-1.428571429t + t2 = 0 + -0.2244897959

Combine like terms: 0 + -0.2244897959 = -0.2244897959
-1.428571429t + t2 = -0.2244897959

The t term is -1.428571429t.  Take half its coefficient (-0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
-1.428571429t + 0.5102040819 + t2 = -0.2244897959 + 0.5102040819

Reorder the terms:
0.5102040819 + -1.428571429t + t2 = -0.2244897959 + 0.5102040819

Combine like terms: -0.2244897959 + 0.5102040819 = 0.285714286
0.5102040819 + -1.428571429t + t2 = 0.285714286

Factor a perfect square on the left side:
(t + -0.7142857145)(t + -0.7142857145) = 0.285714286

Calculate the square root of the right side: 0.534522484

Break this problem into two subproblems by setting 
(t + -0.7142857145) equal to 0.534522484 and -0.534522484.

Subproblem 1

t + -0.7142857145 = 0.534522484 Simplifying t + -0.7142857145 = 0.534522484 Reorder the terms: -0.7142857145 + t = 0.534522484 Solving -0.7142857145 + t = 0.534522484 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + t = 0.534522484 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + t = 0.534522484 + 0.7142857145 t = 0.534522484 + 0.7142857145 Combine like terms: 0.534522484 + 0.7142857145 = 1.2488081985 t = 1.2488081985 Simplifying t = 1.2488081985

Subproblem 2

t + -0.7142857145 = -0.534522484 Simplifying t + -0.7142857145 = -0.534522484 Reorder the terms: -0.7142857145 + t = -0.534522484 Solving -0.7142857145 + t = -0.534522484 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + t = -0.534522484 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + t = -0.534522484 + 0.7142857145 t = -0.534522484 + 0.7142857145 Combine like terms: -0.534522484 + 0.7142857145 = 0.1797632305 t = 0.1797632305 Simplifying t = 0.1797632305

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.2488081985, 0.1797632305}

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