4
Question
Use the formula to find the factors.
(1) x2 – y2
(1) x2 – y2
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Solution
x2 – y2
= (x + y) (x – y) [a2 – b2 = (a + b) (a – b)]
∴ x2 – y2 = (x + y) (x – y)
= (x + y) (x – y) [a2 – b2 = (a + b) (a – b)]
∴ x2 – y2 = (x + y) (x – y)
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