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

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


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

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

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

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

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

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

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

Combine like terms: -6t + -3t = -9t
-2 + -9t + 4t2 + 2t2 = 0

Combine like terms: 4t2 + 2t2 = 6t2
-2 + -9t + 6t2 = 0

Solving
-2 + -9t + 6t2 = 0

Solving for variable 't'.

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

Divide each side by '6'.
-0.3333333333 + -1.5t + t2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -1.5t + 0.3333333333 + t2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -1.5t + t2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -1.5t + t2 = 0 + 0.3333333333
-1.5t + t2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-1.5t + t2 = 0.3333333333

The t term is -1.5t.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5t + 0.5625 + t2 = 0.3333333333 + 0.5625

Reorder the terms:
0.5625 + -1.5t + t2 = 0.3333333333 + 0.5625

Combine like terms: 0.3333333333 + 0.5625 = 0.8958333333
0.5625 + -1.5t + t2 = 0.8958333333

Factor a perfect square on the left side:
(t + -0.75)(t + -0.75) = 0.8958333333

Calculate the square root of the right side: 0.946484724

Break this problem into two subproblems by setting 
(t + -0.75) equal to 0.946484724 and -0.946484724.

Subproblem 1

t + -0.75 = 0.946484724 Simplifying t + -0.75 = 0.946484724 Reorder the terms: -0.75 + t = 0.946484724 Solving -0.75 + t = 0.946484724 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + t = 0.946484724 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + t = 0.946484724 + 0.75 t = 0.946484724 + 0.75 Combine like terms: 0.946484724 + 0.75 = 1.696484724 t = 1.696484724 Simplifying t = 1.696484724

Subproblem 2

t + -0.75 = -0.946484724 Simplifying t + -0.75 = -0.946484724 Reorder the terms: -0.75 + t = -0.946484724 Solving -0.75 + t = -0.946484724 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + t = -0.946484724 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + t = -0.946484724 + 0.75 t = -0.946484724 + 0.75 Combine like terms: -0.946484724 + 0.75 = -0.196484724 t = -0.196484724 Simplifying t = -0.196484724

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.696484724, -0.196484724}

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