factor x^2-(3y+2)^2
Let's factorize in ℝ: x2 -(3y + 2)2
For x2 -(3y + 2)2, we recognize a difference of two squares: x2 -(3y + 2)2. Apply a2 -b2 = (a -b)·(a + b), with a = x and b = 3y + 2
You can write the expression: x2 -(3y + 2)2 in factored form: (x -(3y + 2))·(x + (3y + 2))
Let's factor in ℝ: (x -(3y + 2))·(x + (3y + 2))
ⓘ A minus sign before a parenthesis changes the sign of each of its terms: -(3y + 2) = -3y -2
(x -3y -2)·(x + 3y + 2)
▶Factored expression:   (x + 3y + 2)·(x -3y -2)