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Expansion of (x^2 - y^2)

Using a 2 -...

Question

Using $a^{2} - b^{2} = (a + b) (a - b)$ find the value of $297 \times 303$

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Solution

$297 \times 303 = (300 - 3) (300 + 3)$

$= 300^{2} - 3^{2}$

$= 90000 - 9 = 89, 991 ‬$

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