因式分解x^4+4x^2y^2+16y^4

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因式分解x^4+4x^2y^2+16y^4

因式分解x^4+4x^2y^2+16y^4
因式分解x^4+4x^2y^2+16y^4

因式分解x^4+4x^2y^2+16y^4
原式=x^4+8x²y²+16y^4-4x²y²
=(x²+4y²)²-4x²y²
=(x²+2xy+4y²)(x²-2xy+4y²)

x^4+4x^2y^2+16y^4
=x^4+8x^2y^2+16y^4-4x²y²
=(x²+4y²)²-(2xy)²
=(x²+2xy+4y²)(x²-2xy+4y²)

^是什么意思?

x⁴+4x²y²+16y⁴
=x⁴+8x²y²+16y⁴-4x²y²
=(x²+4y²)²-(2xy)²
=(x²+4y²+2xy)(x²+4y²-2xy)

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x^4+4x^2y^2+16y^4
=(x²+2y²)²