Video Transcript
If 𝑥 plus 𝑦 is equal to two and
𝑥 minus 𝑦 equals six, what is the value of 𝑥 squared minus 𝑦 squared?
The expression 𝑥 squared minus 𝑦
squared is known as the difference of two squares. This factors or factorizes into two
parentheses or brackets: 𝑥 plus 𝑦 multiplied by 𝑥 minus 𝑦. In this question, we’re told that
𝑥 plus 𝑦 is equal to two and 𝑥 minus 𝑦 is equal to six. Multiplying these numbers gives us
an answer of 12. If 𝑥 plus 𝑦 is equal to two and
𝑥 minus 𝑦 is equal to six, then 𝑥 squared 𝑦 squared is equal to 12. It is the product of these two
numbers.
