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

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

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

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

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

Multiply (3 + 4a) * (-3 + a)
(3(-3 + a) + 4a * (-3 + a)) = 0
((-3 * 3 + a * 3) + 4a * (-3 + a)) = 0
((-9 + 3a) + 4a * (-3 + a)) = 0
(-9 + 3a + (-3 * 4a + a * 4a)) = 0
(-9 + 3a + (-12a + 4a2)) = 0

Combine like terms: 3a + -12a = -9a
(-9 + -9a + 4a2) = 0

Solving
-9 + -9a + 4a2 = 0

Solving for variable 'a'.

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

Subproblem 1
Set the factor '(-3 + -4a)' equal to zero and attempt to solve:

Simplifying
-3 + -4a = 0

Solving
-3 + -4a = 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 + -4a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -4a = 0 + 3
-4a = 0 + 3

Combine like terms: 0 + 3 = 3
-4a = 3

Divide each side by '-4'.
a = -0.75

Simplifying
a = -0.75
Subproblem 2
Set the factor '(3 + -1a)' equal to zero and attempt to solve:

Simplifying
3 + -1a = 0

Solving
3 + -1a = 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 + -1a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1a = 0 + -3
-1a = 0 + -3

Combine like terms: 0 + -3 = -3
-1a = -3

Divide each side by '-1'.
a = 3

Simplifying
a = 3
Solution
a = {-0.75, 3}