(3t-7)(4t+4)+5t-7=

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


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

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

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

Multiply (-7 + 3t) * (4 + 4t)
(-7(4 + 4t) + 3t * (4 + 4t)) + 5t + -7 = 0
((4 * -7 + 4t * -7) + 3t * (4 + 4t)) + 5t + -7 = 0
((-28 + -28t) + 3t * (4 + 4t)) + 5t + -7 = 0
(-28 + -28t + (4 * 3t + 4t * 3t)) + 5t + -7 = 0
(-28 + -28t + (12t + 12t2)) + 5t + -7 = 0

Combine like terms: -28t + 12t = -16t
(-28 + -16t + 12t2) + 5t + -7 = 0

Reorder the terms:
-28 + -7 + -16t + 5t + 12t2 = 0

Combine like terms: -28 + -7 = -35
-35 + -16t + 5t + 12t2 = 0

Combine like terms: -16t + 5t = -11t
-35 + -11t + 12t2 = 0

Solving
-35 + -11t + 12t2 = 0

Solving for variable 't'.

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

Divide each side by '12'.
-2.916666667 + -0.9166666667t + t2 = 0

Move the constant term to the right:

Add '2.916666667' to each side of the equation.
-2.916666667 + -0.9166666667t + 2.916666667 + t2 = 0 + 2.916666667

Reorder the terms:
-2.916666667 + 2.916666667 + -0.9166666667t + t2 = 0 + 2.916666667

Combine like terms: -2.916666667 + 2.916666667 = 0.000000000
0.000000000 + -0.9166666667t + t2 = 0 + 2.916666667
-0.9166666667t + t2 = 0 + 2.916666667

Combine like terms: 0 + 2.916666667 = 2.916666667
-0.9166666667t + t2 = 2.916666667

The t term is -0.9166666667t.  Take half its coefficient (-0.4583333334).
Square it (0.2100694445) and add it to both sides.

Add '0.2100694445' to each side of the equation.
-0.9166666667t + 0.2100694445 + t2 = 2.916666667 + 0.2100694445

Reorder the terms:
0.2100694445 + -0.9166666667t + t2 = 2.916666667 + 0.2100694445

Combine like terms: 2.916666667 + 0.2100694445 = 3.1267361115
0.2100694445 + -0.9166666667t + t2 = 3.1267361115

Factor a perfect square on the left side:
(t + -0.4583333334)(t + -0.4583333334) = 3.1267361115

Calculate the square root of the right side: 1.768257931

Break this problem into two subproblems by setting 
(t + -0.4583333334) equal to 1.768257931 and -1.768257931.

Subproblem 1

t + -0.4583333334 = 1.768257931 Simplifying t + -0.4583333334 = 1.768257931 Reorder the terms: -0.4583333334 + t = 1.768257931 Solving -0.4583333334 + t = 1.768257931 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4583333334' to each side of the equation. -0.4583333334 + 0.4583333334 + t = 1.768257931 + 0.4583333334 Combine like terms: -0.4583333334 + 0.4583333334 = 0.0000000000 0.0000000000 + t = 1.768257931 + 0.4583333334 t = 1.768257931 + 0.4583333334 Combine like terms: 1.768257931 + 0.4583333334 = 2.2265912644 t = 2.2265912644 Simplifying t = 2.2265912644

Subproblem 2

t + -0.4583333334 = -1.768257931 Simplifying t + -0.4583333334 = -1.768257931 Reorder the terms: -0.4583333334 + t = -1.768257931 Solving -0.4583333334 + t = -1.768257931 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.4583333334' to each side of the equation. -0.4583333334 + 0.4583333334 + t = -1.768257931 + 0.4583333334 Combine like terms: -0.4583333334 + 0.4583333334 = 0.0000000000 0.0000000000 + t = -1.768257931 + 0.4583333334 t = -1.768257931 + 0.4583333334 Combine like terms: -1.768257931 + 0.4583333334 = -1.3099245976 t = -1.3099245976 Simplifying t = -1.3099245976

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.2265912644, -1.3099245976}

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