-4t(t-4)+8t=9t-7

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Solution for -4t(t-4)+8t=9t-7 equation:


Simplifying
-4t(t + -4) + 8t = 9t + -7

Reorder the terms:
-4t(-4 + t) + 8t = 9t + -7
(-4 * -4t + t * -4t) + 8t = 9t + -7
(16t + -4t2) + 8t = 9t + -7

Reorder the terms:
16t + 8t + -4t2 = 9t + -7

Combine like terms: 16t + 8t = 24t
24t + -4t2 = 9t + -7

Reorder the terms:
24t + -4t2 = -7 + 9t

Solving
24t + -4t2 = -7 + 9t

Solving for variable 't'.

Reorder the terms:
7 + 24t + -9t + -4t2 = -7 + 9t + 7 + -9t

Combine like terms: 24t + -9t = 15t
7 + 15t + -4t2 = -7 + 9t + 7 + -9t

Reorder the terms:
7 + 15t + -4t2 = -7 + 7 + 9t + -9t

Combine like terms: -7 + 7 = 0
7 + 15t + -4t2 = 0 + 9t + -9t
7 + 15t + -4t2 = 9t + -9t

Combine like terms: 9t + -9t = 0
7 + 15t + -4t2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-1.75 + -3.75t + t2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + -3.75t + 1.75 + t2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + -3.75t + t2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + -3.75t + t2 = 0 + 1.75
-3.75t + t2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
-3.75t + t2 = 1.75

The t term is -3.75t.  Take half its coefficient (-1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
-3.75t + 3.515625 + t2 = 1.75 + 3.515625

Reorder the terms:
3.515625 + -3.75t + t2 = 1.75 + 3.515625

Combine like terms: 1.75 + 3.515625 = 5.265625
3.515625 + -3.75t + t2 = 5.265625

Factor a perfect square on the left side:
(t + -1.875)(t + -1.875) = 5.265625

Calculate the square root of the right side: 2.294694969

Break this problem into two subproblems by setting 
(t + -1.875) equal to 2.294694969 and -2.294694969.

Subproblem 1

t + -1.875 = 2.294694969 Simplifying t + -1.875 = 2.294694969 Reorder the terms: -1.875 + t = 2.294694969 Solving -1.875 + t = 2.294694969 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + t = 2.294694969 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + t = 2.294694969 + 1.875 t = 2.294694969 + 1.875 Combine like terms: 2.294694969 + 1.875 = 4.169694969 t = 4.169694969 Simplifying t = 4.169694969

Subproblem 2

t + -1.875 = -2.294694969 Simplifying t + -1.875 = -2.294694969 Reorder the terms: -1.875 + t = -2.294694969 Solving -1.875 + t = -2.294694969 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.875' to each side of the equation. -1.875 + 1.875 + t = -2.294694969 + 1.875 Combine like terms: -1.875 + 1.875 = 0.000 0.000 + t = -2.294694969 + 1.875 t = -2.294694969 + 1.875 Combine like terms: -2.294694969 + 1.875 = -0.419694969 t = -0.419694969 Simplifying t = -0.419694969

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.169694969, -0.419694969}

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