(5-3z)(5+3z)=

Solution for (5-3z)(5+3z)= equation:

Simplifying
(5 + -3z)(5 + 3z) = 0

Multiply (5 + -3z) * (5 + 3z)
(5(5 + 3z) + -3z * (5 + 3z)) = 0
((5 * 5 + 3z * 5) + -3z * (5 + 3z)) = 0
((25 + 15z) + -3z * (5 + 3z)) = 0
(25 + 15z + (5 * -3z + 3z * -3z)) = 0
(25 + 15z + (-15z + -9z2)) = 0

Combine like terms: 15z + -15z = 0
(25 + 0 + -9z2) = 0
(25 + -9z2) = 0

Solving
25 + -9z2 = 0

Solving for variable 'z'.

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

Add '-25' to each side of the equation.
25 + -25 + -9z2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -9z2 = 0 + -25
-9z2 = 0 + -25

Combine like terms: 0 + -25 = -25
-9z2 = -25

Divide each side by '-9'.
z2 = 2.777777778

Simplifying
z2 = 2.777777778

Take the square root of each side:
z = {-1.666666667, 1.666666667}