Question

expand (x^2 - y^2). find the following please
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Answer 1

Answer:

${x}^{2} - {y}^{2} \\ \\ = (x + y)(x - y) \\ \\ = {x}^{2} - xy - xy + {y}^{2} \\ \\ = {x}^{2} - 2xy + {y}^{2}$