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x4 + 7x2 - 60 = x4 + 12x2 - 5x2 - 60 = x2(x2 + 12) - 5(x2 +12) = (x2 - 5)(x2 +12)

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15y ago
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9y ago

(x^2 + 12)(x^2 - 5)

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Q: X4 plus 7x2 minus 60 factor completely?
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