Tentukan hasil pemangkatan berikut!
1. (8 + √5)²
2. (4√7 - √8)²
1. (8 + √5)²
2. (4√7 - √8)²
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1. (8+√5)² = 8²+5+2.8.√5
= 64+5+16√5
(8+√5)² = 69 + 16√5
2. (4√7 - √8)² = 4².7 + 8 - 2.4√7.√8
= 16.7 - 8 - 8√56
= 8(2.7 - 1) - 8√56
(4√7 - √8)² = 8.13 - 8.√56 = 104-8√56