(5-4s)(5+4s)=0

Solution for (5-4s)(5+4s)=0 equation:

Simplifying
(5 + -4s)(5 + 4s) = 0

Multiply (5 + -4s) * (5 + 4s)
(5(5 + 4s) + -4s * (5 + 4s)) = 0
((5 * 5 + 4s * 5) + -4s * (5 + 4s)) = 0
((25 + 20s) + -4s * (5 + 4s)) = 0
(25 + 20s + (5 * -4s + 4s * -4s)) = 0
(25 + 20s + (-20s + -16s2)) = 0

Combine like terms: 20s + -20s = 0
(25 + 0 + -16s2) = 0
(25 + -16s2) = 0

Solving
25 + -16s2 = 0

Solving for variable 's'.

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

Add '-25' to each side of the equation.
25 + -25 + -16s2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -16s2 = 0 + -25
-16s2 = 0 + -25

Combine like terms: 0 + -25 = -25
-16s2 = -25

Divide each side by '-16'.
s2 = 1.5625

Simplifying
s2 = 1.5625

Take the square root of each side:
s = {-1.25, 1.25}