Multiply and simplify: (6x + 3y)(6x − 3y) Question Multiply and simplify: (6x + 3y)(6x − 3y) in progress 0 Math Isabelle 3 months 2021-10-19T23:13:59+00:00 2021-10-19T23:13:59+00:00 2 Answers 0 views 0

## Answers ( )

Answer:

36x² – 9y²

Step-by-step explanation:

(6x + 3y)(6x − 3y)

(6x)² – (3y)²

36x² – 9y²

Answer:36x² – 9y²

Step-by-step explanation:We see that the given expression (6x + 3y)(6x – 3y) looks just like the expression (a + b)(a – b). When multiplied out, this is a difference of squares identity that I highly recommend you memorise:

(a + b)(a – b) = a² – b²

Here, a = 6x and b = 3y, so plug these in:

(6x + 3y)(6x – 3y) = (6x)² – (3y)² =

36x² – 9y²