(5a+5)(5a-5)=

Solution for (5a+5)(5a-5)= equation:

Simplifying
(5a + 5)(5a + -5) = 0

Reorder the terms:
(5 + 5a)(5a + -5) = 0

Reorder the terms:
(5 + 5a)(-5 + 5a) = 0

Multiply (5 + 5a) * (-5 + 5a)
(5(-5 + 5a) + 5a * (-5 + 5a)) = 0
((-5 * 5 + 5a * 5) + 5a * (-5 + 5a)) = 0
((-25 + 25a) + 5a * (-5 + 5a)) = 0
(-25 + 25a + (-5 * 5a + 5a * 5a)) = 0
(-25 + 25a + (-25a + 25a2)) = 0

Combine like terms: 25a + -25a = 0
(-25 + 0 + 25a2) = 0
(-25 + 25a2) = 0

Solving
-25 + 25a2 = 0

Solving for variable 'a'.

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

Add '25' to each side of the equation.
-25 + 25 + 25a2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 25a2 = 0 + 25
25a2 = 0 + 25

Combine like terms: 0 + 25 = 25
25a2 = 25

Divide each side by '25'.
a2 = 1

Simplifying
a2 = 1

Take the square root of each side:
a = {-1, 1}