Question

$(x - y)(x + y)$
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Answer 1

Answer:

l hope it's help you........

Answer 2

Step-by-step explanation:

Remember......

$(a + b)(a - b) = {a}^{2} - {b}^{2} \\ \\ proof = > \\ (a + b)(a - b) \\ a(a - b) + b(a - b) \\ {a}^{2} - ab + ab - {b}^{2} \\ {a}^{2} - {b}^{2} \\ \\ \\ similarly = > \\ (x + y)(x - y) = {x}^{2} - {y}^{2}$