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

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

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

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

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

Multiply (-4 + 9t) * (-4 + -9t)
(-4(-4 + -9t) + 9t * (-4 + -9t)) = 0
((-4 * -4 + -9t * -4) + 9t * (-4 + -9t)) = 0
((16 + 36t) + 9t * (-4 + -9t)) = 0
(16 + 36t + (-4 * 9t + -9t * 9t)) = 0
(16 + 36t + (-36t + -81t2)) = 0

Combine like terms: 36t + -36t = 0
(16 + 0 + -81t2) = 0
(16 + -81t2) = 0

Solving
16 + -81t2 = 0

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-16' to each side of the equation.
16 + -16 + -81t2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -81t2 = 0 + -16
-81t2 = 0 + -16

Combine like terms: 0 + -16 = -16
-81t2 = -16

Divide each side by '-81'.
t2 = 0.1975308642

Simplifying
t2 = 0.1975308642

Take the square root of each side:
t = {-0.444444444, 0.444444444}