(9t-4)(-9t-5)=

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Solution for (9t-4)(-9t-5)= equation:


Simplifying
(9t + -4)(-9t + -5) = 0

Reorder the terms:
(-4 + 9t)(-9t + -5) = 0

Reorder the terms:
(-4 + 9t)(-5 + -9t) = 0

Multiply (-4 + 9t) * (-5 + -9t)
(-4(-5 + -9t) + 9t * (-5 + -9t)) = 0
((-5 * -4 + -9t * -4) + 9t * (-5 + -9t)) = 0
((20 + 36t) + 9t * (-5 + -9t)) = 0
(20 + 36t + (-5 * 9t + -9t * 9t)) = 0
(20 + 36t + (-45t + -81t2)) = 0

Combine like terms: 36t + -45t = -9t
(20 + -9t + -81t2) = 0

Solving
20 + -9t + -81t2 = 0

Solving for variable 't'.

Factor a trinomial.
(4 + -9t)(5 + 9t) = 0

Subproblem 1

Set the factor '(4 + -9t)' equal to zero and attempt to solve: Simplifying 4 + -9t = 0 Solving 4 + -9t = 0 Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -9t = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -9t = 0 + -4 -9t = 0 + -4 Combine like terms: 0 + -4 = -4 -9t = -4 Divide each side by '-9'. t = 0.4444444444 Simplifying t = 0.4444444444

Subproblem 2

Set the factor '(5 + 9t)' equal to zero and attempt to solve: Simplifying 5 + 9t = 0 Solving 5 + 9t = 0 Move all terms containing t to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 9t = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 9t = 0 + -5 9t = 0 + -5 Combine like terms: 0 + -5 = -5 9t = -5 Divide each side by '9'. t = -0.5555555556 Simplifying t = -0.5555555556

Solution

t = {0.4444444444, -0.5555555556}

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