Question

Factorise x²-y².
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Answer 1

${x}^{2} - {y}^{2}$

$= {x}^{2} - xy + xy - {y}^{2}$

$= x(x - y) + y(x - y)$

$= (x + y)(x - y)$

Answer 2

hello

x²-y²

=x²-xy+xy-y²

=x(x-y) +y(x-y)

=(x+y) (x-y)