11t^2-7t-100=0

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Solution for 11t^2-7t-100=0 equation:


Simplifying
11t2 + -7t + -100 = 0

Reorder the terms:
-100 + -7t + 11t2 = 0

Solving
-100 + -7t + 11t2 = 0

Solving for variable 't'.

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

Divide each side by '11'.
-9.090909091 + -0.6363636364t + t2 = 0

Move the constant term to the right:

Add '9.090909091' to each side of the equation.
-9.090909091 + -0.6363636364t + 9.090909091 + t2 = 0 + 9.090909091

Reorder the terms:
-9.090909091 + 9.090909091 + -0.6363636364t + t2 = 0 + 9.090909091

Combine like terms: -9.090909091 + 9.090909091 = 0.000000000
0.000000000 + -0.6363636364t + t2 = 0 + 9.090909091
-0.6363636364t + t2 = 0 + 9.090909091

Combine like terms: 0 + 9.090909091 = 9.090909091
-0.6363636364t + t2 = 9.090909091

The t term is -0.6363636364t.  Take half its coefficient (-0.3181818182).
Square it (0.1012396694) and add it to both sides.

Add '0.1012396694' to each side of the equation.
-0.6363636364t + 0.1012396694 + t2 = 9.090909091 + 0.1012396694

Reorder the terms:
0.1012396694 + -0.6363636364t + t2 = 9.090909091 + 0.1012396694

Combine like terms: 9.090909091 + 0.1012396694 = 9.1921487604
0.1012396694 + -0.6363636364t + t2 = 9.1921487604

Factor a perfect square on the left side:
(t + -0.3181818182)(t + -0.3181818182) = 9.1921487604

Calculate the square root of the right side: 3.031855663

Break this problem into two subproblems by setting 
(t + -0.3181818182) equal to 3.031855663 and -3.031855663.

Subproblem 1

t + -0.3181818182 = 3.031855663 Simplifying t + -0.3181818182 = 3.031855663 Reorder the terms: -0.3181818182 + t = 3.031855663 Solving -0.3181818182 + t = 3.031855663 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3181818182' to each side of the equation. -0.3181818182 + 0.3181818182 + t = 3.031855663 + 0.3181818182 Combine like terms: -0.3181818182 + 0.3181818182 = 0.0000000000 0.0000000000 + t = 3.031855663 + 0.3181818182 t = 3.031855663 + 0.3181818182 Combine like terms: 3.031855663 + 0.3181818182 = 3.3500374812 t = 3.3500374812 Simplifying t = 3.3500374812

Subproblem 2

t + -0.3181818182 = -3.031855663 Simplifying t + -0.3181818182 = -3.031855663 Reorder the terms: -0.3181818182 + t = -3.031855663 Solving -0.3181818182 + t = -3.031855663 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3181818182' to each side of the equation. -0.3181818182 + 0.3181818182 + t = -3.031855663 + 0.3181818182 Combine like terms: -0.3181818182 + 0.3181818182 = 0.0000000000 0.0000000000 + t = -3.031855663 + 0.3181818182 t = -3.031855663 + 0.3181818182 Combine like terms: -3.031855663 + 0.3181818182 = -2.7136738448 t = -2.7136738448 Simplifying t = -2.7136738448

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.3500374812, -2.7136738448}

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