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
Answer:
its pretty simple
Step-by-step explanation:
8 x 8 x 4, so (8 x 8) x 4
64 x 4 = 256
The distance is 3, because 7 - 4 = 3.
We have:
20-minute bike ride
It takes 4 minutes for him to go a kilometer
k is the number of kilometers Garret has already biked
Number of minutes Garret has already biked:
4k
Number of minutes remaining in Garret's ride
20-4k
4(5-k)
Number of kilometers Garret has left to ride
5-k
