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2¹⁹⁹⁷X3¹⁹⁹⁸₋2¹⁹⁹⁸X3¹⁹⁹⁷=

Răspuns :

2¹⁹⁹⁷ ·3¹⁹⁹⁷ ( 1·3¹-2¹·1) = 2¹⁹⁹⁷ ·3¹⁹⁹⁷·(3-2) = 2¹⁹⁹⁷·3¹⁹⁹⁷ = 5¹⁹⁹⁷