✨ Best Answer ✨
4x⁴－13x²＋9
＝4x⁴－12x²＋9－x²
＝(2x²－3)²－(x)²
＝{(2x²－3)＋(x)}{(2x²－3)－(x)}
＝(2x²＋x－3)(2x²－x－3)
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