因式分解5(x^2+1)^2-20x^2

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因式分解5(x^2+1)^2-20x^2
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因式分解5(x^2+1)^2-20x^2
因式分解5(x^2+1)^2-20x^2

因式分解5(x^2+1)^2-20x^2
5(x^2+1)^2-20x^2
=5(x^2+1+2x)(x^2+1-2x)
=5(x+1)^2(x-1)^2

5(x^2+1)^2-20x^2
=5[(x^2+1)^2-4x^2]
=5(x^2+2x+1)(x^2-2x+1)
=5(x+1)^2(x-1)^2

解: 5(x²+1)²-20x²
=5(x^4+2x²+1)-20x²
=5x^4+10x²+5-20x²
=5x^4-10x²+5
=5(x^4-2x²+1)
=5(x²-1)²
=5[(x+1)(x-²1)]²
=5(x+1)²(x-1)²
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