lim (√2x²-9 - √2x)(√2x²-9 + √2x)/(√2x²-9 + √2x)
=2x²-9-2x/(√2x²-9+√2x)
=(2 - 9/x²-2/x) / √2/x²-9/x⁴ + √2/x³)
=2/0=~
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lim (√2x²-9 - √2x)(√2x²-9 + √2x)/(√2x²-9 + √2x)
=2x²-9-2x/(√2x²-9+√2x)
=(2 - 9/x²-2/x) / √2/x²-9/x⁴ + √2/x³)
=2/0=~