4x四次方y²-5x²y²-9y²,因式分解,
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4x四次方y²-5x²y²-9y²,因式分解,
4x四次方y²-5x²y²-9y²,因式分解,
4x四次方y²-5x²y²-9y²,因式分解,
原式=y²(4x^4-5x²-9)
=y²(4x²-9)(x+y)
=y²(2x+3)(2x-3)(x-y)
=y²(4x^4-5x²-9)
=y²(4x²-9)(x²+1)
=y²(2x+3)(2x-3)(x²+1)
4x四次方y²-5x²y²-9y²,
=y^2(4x^4-5x^2-9)
=y^2(4x^2-9)(x^2+1)
=y^2(2x+3)(2x-3)(x^2+1)