Perpangkatan

<p>1. a. (7¹¹)⁷ : (7⁷)⁵ = 7⁷⁷ : 7³⁵ = 7⁴²</p><p>&nbsp; &nbsp; &nbsp;b. (5³)⁴ x (5²)³ = 5¹² x 5⁶ = 5¹⁸</p><p>&nbsp;</p><p>2. a. 7² + 7³ = 49 + 343 = 392</p><p>&nbsp; &nbsp; &nbsp;b. 9³ - 9² x 9⁰ = 729 - 81 x 1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 729 - 81</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 648</p><p>&nbsp;</p><p>3. a. √1369 - √144 = 37 - 12 = 25</p><p>&nbsp; &nbsp; &nbsp;b. -7√45 + 2√5 = -7(√(9 x 5) + 2√5</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= -7(3√5) + 2√5</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= -21√5 + 2√5</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= -19√5</p>