1.

Expand (3a -2b)^2Evaluate (16/ 81) ^1/4

Answer»

(3a-2b)² = (3a)² + (2b)² - 2×4a×2b =9a² + 4b² - 12ab

3a -2

3a-2b=3a+2b-2×4a×2b=9a+4b-12ab



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