(4a-4)(5a+6)=

Solution for (4a-4)(5a+6)= equation:

Simplifying
(4a + -4)(5a + 6) = 0

Reorder the terms:
(-4 + 4a)(5a + 6) = 0

Reorder the terms:
(-4 + 4a)(6 + 5a) = 0

Multiply (-4 + 4a) * (6 + 5a)
(-4(6 + 5a) + 4a * (6 + 5a)) = 0
((6 * -4 + 5a * -4) + 4a * (6 + 5a)) = 0
((-24 + -20a) + 4a * (6 + 5a)) = 0
(-24 + -20a + (6 * 4a + 5a * 4a)) = 0
(-24 + -20a + (24a + 20a2)) = 0

Combine like terms: -20a + 24a = 4a
(-24 + 4a + 20a2) = 0

Solving
-24 + 4a + 20a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-6 + a + 5a2) = 0

Factor a trinomial.
4((-6 + -5a)(1 + -1a)) = 0

Ignore the factor 4.
Subproblem 1
Set the factor '(-6 + -5a)' equal to zero and attempt to solve:

Simplifying
-6 + -5a = 0

Solving
-6 + -5a = 0

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

Add '6' to each side of the equation.
-6 + 6 + -5a = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -5a = 0 + 6
-5a = 0 + 6

Combine like terms: 0 + 6 = 6
-5a = 6

Divide each side by '-5'.
a = -1.2

Simplifying
a = -1.2
Subproblem 2
Set the factor '(1 + -1a)' equal to zero and attempt to solve:

Simplifying
1 + -1a = 0

Solving
1 + -1a = 0

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

Add '-1' to each side of the equation.
1 + -1 + -1a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1a = 0 + -1
-1a = 0 + -1

Combine like terms: 0 + -1 = -1
-1a = -1

Divide each side by '-1'.
a = 1

Simplifying
a = 1
Solution
a = {-1.2, 1}