(2t^2-7t-3)+(6t^2-4t+5)=

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Solution for (2t^2-7t-3)+(6t^2-4t+5)= equation:


Simplifying
(2t2 + -7t + -3) + (6t2 + -4t + 5) = 0

Reorder the terms:
(-3 + -7t + 2t2) + (6t2 + -4t + 5) = 0

Remove parenthesis around (-3 + -7t + 2t2)
-3 + -7t + 2t2 + (6t2 + -4t + 5) = 0

Reorder the terms:
-3 + -7t + 2t2 + (5 + -4t + 6t2) = 0

Remove parenthesis around (5 + -4t + 6t2)
-3 + -7t + 2t2 + 5 + -4t + 6t2 = 0

Reorder the terms:
-3 + 5 + -7t + -4t + 2t2 + 6t2 = 0

Combine like terms: -3 + 5 = 2
2 + -7t + -4t + 2t2 + 6t2 = 0

Combine like terms: -7t + -4t = -11t
2 + -11t + 2t2 + 6t2 = 0

Combine like terms: 2t2 + 6t2 = 8t2
2 + -11t + 8t2 = 0

Solving
2 + -11t + 8t2 = 0

Solving for variable 't'.

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

Divide each side by '8'.
0.25 + -1.375t + t2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -1.375t + -0.25 + t2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -1.375t + t2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -1.375t + t2 = 0 + -0.25
-1.375t + t2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-1.375t + t2 = -0.25

The t term is -1.375t.  Take half its coefficient (-0.6875).
Square it (0.47265625) and add it to both sides.

Add '0.47265625' to each side of the equation.
-1.375t + 0.47265625 + t2 = -0.25 + 0.47265625

Reorder the terms:
0.47265625 + -1.375t + t2 = -0.25 + 0.47265625

Combine like terms: -0.25 + 0.47265625 = 0.22265625
0.47265625 + -1.375t + t2 = 0.22265625

Factor a perfect square on the left side:
(t + -0.6875)(t + -0.6875) = 0.22265625

Calculate the square root of the right side: 0.471864652

Break this problem into two subproblems by setting 
(t + -0.6875) equal to 0.471864652 and -0.471864652.

Subproblem 1

t + -0.6875 = 0.471864652 Simplifying t + -0.6875 = 0.471864652 Reorder the terms: -0.6875 + t = 0.471864652 Solving -0.6875 + t = 0.471864652 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + t = 0.471864652 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + t = 0.471864652 + 0.6875 t = 0.471864652 + 0.6875 Combine like terms: 0.471864652 + 0.6875 = 1.159364652 t = 1.159364652 Simplifying t = 1.159364652

Subproblem 2

t + -0.6875 = -0.471864652 Simplifying t + -0.6875 = -0.471864652 Reorder the terms: -0.6875 + t = -0.471864652 Solving -0.6875 + t = -0.471864652 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + t = -0.471864652 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + t = -0.471864652 + 0.6875 t = -0.471864652 + 0.6875 Combine like terms: -0.471864652 + 0.6875 = 0.215635348 t = 0.215635348 Simplifying t = 0.215635348

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.159364652, 0.215635348}

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