4.9t^2+11t=76

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Solution for 4.9t^2+11t=76 equation:


Simplifying
4.9t2 + 11t = 76

Reorder the terms:
11t + 4.9t2 = 76

Solving
11t + 4.9t2 = 76

Solving for variable 't'.

Reorder the terms:
-76 + 11t + 4.9t2 = 76 + -76

Combine like terms: 76 + -76 = 0
-76 + 11t + 4.9t2 = 0

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

Divide each side by '4.9'.
-15.51020408 + 2.244897959t + t2 = 0

Move the constant term to the right:

Add '15.51020408' to each side of the equation.
-15.51020408 + 2.244897959t + 15.51020408 + t2 = 0 + 15.51020408

Reorder the terms:
-15.51020408 + 15.51020408 + 2.244897959t + t2 = 0 + 15.51020408

Combine like terms: -15.51020408 + 15.51020408 = 0.00000000
0.00000000 + 2.244897959t + t2 = 0 + 15.51020408
2.244897959t + t2 = 0 + 15.51020408

Combine like terms: 0 + 15.51020408 = 15.51020408
2.244897959t + t2 = 15.51020408

The t term is 2.244897959t.  Take half its coefficient (1.12244898).
Square it (1.259891713) and add it to both sides.

Add '1.259891713' to each side of the equation.
2.244897959t + 1.259891713 + t2 = 15.51020408 + 1.259891713

Reorder the terms:
1.259891713 + 2.244897959t + t2 = 15.51020408 + 1.259891713

Combine like terms: 15.51020408 + 1.259891713 = 16.770095793
1.259891713 + 2.244897959t + t2 = 16.770095793

Factor a perfect square on the left side:
(t + 1.12244898)(t + 1.12244898) = 16.770095793

Calculate the square root of the right side: 4.095130742

Break this problem into two subproblems by setting 
(t + 1.12244898) equal to 4.095130742 and -4.095130742.

Subproblem 1

t + 1.12244898 = 4.095130742 Simplifying t + 1.12244898 = 4.095130742 Reorder the terms: 1.12244898 + t = 4.095130742 Solving 1.12244898 + t = 4.095130742 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.12244898' to each side of the equation. 1.12244898 + -1.12244898 + t = 4.095130742 + -1.12244898 Combine like terms: 1.12244898 + -1.12244898 = 0.00000000 0.00000000 + t = 4.095130742 + -1.12244898 t = 4.095130742 + -1.12244898 Combine like terms: 4.095130742 + -1.12244898 = 2.972681762 t = 2.972681762 Simplifying t = 2.972681762

Subproblem 2

t + 1.12244898 = -4.095130742 Simplifying t + 1.12244898 = -4.095130742 Reorder the terms: 1.12244898 + t = -4.095130742 Solving 1.12244898 + t = -4.095130742 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.12244898' to each side of the equation. 1.12244898 + -1.12244898 + t = -4.095130742 + -1.12244898 Combine like terms: 1.12244898 + -1.12244898 = 0.00000000 0.00000000 + t = -4.095130742 + -1.12244898 t = -4.095130742 + -1.12244898 Combine like terms: -4.095130742 + -1.12244898 = -5.217579722 t = -5.217579722 Simplifying t = -5.217579722

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.972681762, -5.217579722}

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