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b=(5•3)totul la puterea15:5 la puterea 14•3la puterea 15=

Răspuns :

(5·3)¹⁵ : 5¹⁴·3¹⁵= 5¹⁵ x 3¹⁵ :5¹⁴ x 3¹⁵=5¹⁵ :5¹⁴ x 3¹⁵ :3¹⁵=5¹ x 3⁰= 5 x 1=5