(4a-1)(5a+3)=

Solution for (4a-1)(5a+3)= equation:

Simplifying
(4a + -1)(5a + 3) = 0

Reorder the terms:
(-1 + 4a)(5a + 3) = 0

Reorder the terms:
(-1 + 4a)(3 + 5a) = 0

Multiply (-1 + 4a) * (3 + 5a)
(-1(3 + 5a) + 4a * (3 + 5a)) = 0
((3 * -1 + 5a * -1) + 4a * (3 + 5a)) = 0
((-3 + -5a) + 4a * (3 + 5a)) = 0
(-3 + -5a + (3 * 4a + 5a * 4a)) = 0
(-3 + -5a + (12a + 20a2)) = 0

Combine like terms: -5a + 12a = 7a
(-3 + 7a + 20a2) = 0

Solving
-3 + 7a + 20a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-3 + -5a)(1 + -4a) = 0

Subproblem 1
Set the factor '(-3 + -5a)' equal to zero and attempt to solve:

Simplifying
-3 + -5a = 0

Solving
-3 + -5a = 0

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

Add '3' to each side of the equation.
-3 + 3 + -5a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -5a = 0 + 3
-5a = 0 + 3

Combine like terms: 0 + 3 = 3
-5a = 3

Divide each side by '-5'.
a = -0.6

Simplifying
a = -0.6
Subproblem 2
Set the factor '(1 + -4a)' equal to zero and attempt to solve:

Simplifying
1 + -4a = 0

Solving
1 + -4a = 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 + -4a = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -4a = 0 + -1
-4a = 0 + -1

Combine like terms: 0 + -1 = -1
-4a = -1

Divide each side by '-4'.
a = 0.25

Simplifying
a = 0.25
Solution
a = {-0.6, 0.25}