Question

factorize x⁴+y⁴-23x²y²
and xx+(a²-2/a)x-1​

Answer 1

i)x⁴+y⁴-23x²y²

= (x²)²+(y²)² + 2x²y² - 25x²y²

= (x²+y²)² - (5xy)²

= (x²+y²+5xy)(x²+y²-5xy)

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