PLEASE HELP ASAP!!

1 answer:

5 0

By definition we have to:
Difference of squares of two terms is equal to the product of the sum of these terms by the difference of these terms:
$a ^ 2 - b ^ 2 = (a + b) (a - b)
$
We then have the following expression:
$y^ 2-225
$
Rewriting we have:
$y^ 2-15 ^ 2
$
Using the definition, we have to:
$y ^ 2-15 ^ 2 = (y-15) * (y + 15)
$
Answer:
B: is a difference of squares: (y-15)(y+15)

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