x⁴-x²y²+16y⁴
= (x⁴+8x²y²+16y⁴)-9x²y²
= (x²+4y²)²-(3xy)²
= (x²+3xy+4y²)(x²-3xy+4y²) ・・・(答え)
となります。
x⁴-x²y²+16y⁴
= (x⁴+8x²y²+16y⁴)-9x²y²
= (x²+4y²)²-(3xy)²
= (x²+3xy+4y²)(x²-3xy+4y²) ・・・(答え)
となります。
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