(4t-7)(7t+7)+5t-2=

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


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

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

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

Multiply (-7 + 4t) * (7 + 7t)
(-7(7 + 7t) + 4t * (7 + 7t)) + 5t + -2 = 0
((7 * -7 + 7t * -7) + 4t * (7 + 7t)) + 5t + -2 = 0
((-49 + -49t) + 4t * (7 + 7t)) + 5t + -2 = 0
(-49 + -49t + (7 * 4t + 7t * 4t)) + 5t + -2 = 0
(-49 + -49t + (28t + 28t2)) + 5t + -2 = 0

Combine like terms: -49t + 28t = -21t
(-49 + -21t + 28t2) + 5t + -2 = 0

Reorder the terms:
-49 + -2 + -21t + 5t + 28t2 = 0

Combine like terms: -49 + -2 = -51
-51 + -21t + 5t + 28t2 = 0

Combine like terms: -21t + 5t = -16t
-51 + -16t + 28t2 = 0

Solving
-51 + -16t + 28t2 = 0

Solving for variable 't'.

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

Divide each side by '28'.
-1.821428571 + -0.5714285714t + t2 = 0

Move the constant term to the right:

Add '1.821428571' to each side of the equation.
-1.821428571 + -0.5714285714t + 1.821428571 + t2 = 0 + 1.821428571

Reorder the terms:
-1.821428571 + 1.821428571 + -0.5714285714t + t2 = 0 + 1.821428571

Combine like terms: -1.821428571 + 1.821428571 = 0.000000000
0.000000000 + -0.5714285714t + t2 = 0 + 1.821428571
-0.5714285714t + t2 = 0 + 1.821428571

Combine like terms: 0 + 1.821428571 = 1.821428571
-0.5714285714t + t2 = 1.821428571

The t term is -0.5714285714t.  Take half its coefficient (-0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
-0.5714285714t + 0.08163265305 + t2 = 1.821428571 + 0.08163265305

Reorder the terms:
0.08163265305 + -0.5714285714t + t2 = 1.821428571 + 0.08163265305

Combine like terms: 1.821428571 + 0.08163265305 = 1.90306122405
0.08163265305 + -0.5714285714t + t2 = 1.90306122405

Factor a perfect square on the left side:
(t + -0.2857142857)(t + -0.2857142857) = 1.90306122405

Calculate the square root of the right side: 1.379514851

Break this problem into two subproblems by setting 
(t + -0.2857142857) equal to 1.379514851 and -1.379514851.

Subproblem 1

t + -0.2857142857 = 1.379514851 Simplifying t + -0.2857142857 = 1.379514851 Reorder the terms: -0.2857142857 + t = 1.379514851 Solving -0.2857142857 + t = 1.379514851 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + t = 1.379514851 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + t = 1.379514851 + 0.2857142857 t = 1.379514851 + 0.2857142857 Combine like terms: 1.379514851 + 0.2857142857 = 1.6652291367 t = 1.6652291367 Simplifying t = 1.6652291367

Subproblem 2

t + -0.2857142857 = -1.379514851 Simplifying t + -0.2857142857 = -1.379514851 Reorder the terms: -0.2857142857 + t = -1.379514851 Solving -0.2857142857 + t = -1.379514851 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + t = -1.379514851 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + t = -1.379514851 + 0.2857142857 t = -1.379514851 + 0.2857142857 Combine like terms: -1.379514851 + 0.2857142857 = -1.0938005653 t = -1.0938005653 Simplifying t = -1.0938005653

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.6652291367, -1.0938005653}

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