Ответ:
1. (√7 - √5)(√7 + √5)= 7 - 5 = 2
2. (4√2 - 2√3)(4√2 + 2√3) = 16 × 2 - 4 × 3 = 20
3. (7 - 5√2)(7 + 5√2) = 49 - 25 × 2 = - 1
4. (√11 - √176)^2 = 11 - 2 √(11 × 176) + 176 = 11 - 2 × 44 + 176 = 99
5. (2 + √7)^2 - 4√7 = 4 + 7 = 11
6. (√6 - √3)^2 + 6√2 = 6 - 2√18 + 3 + 6√2 = 6 + 3 = 9
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Answers & Comments
Ответ:
1. (√7 - √5)(√7 + √5)= 7 - 5 = 2
2. (4√2 - 2√3)(4√2 + 2√3) = 16 × 2 - 4 × 3 = 20
3. (7 - 5√2)(7 + 5√2) = 49 - 25 × 2 = - 1
4. (√11 - √176)^2 = 11 - 2 √(11 × 176) + 176 = 11 - 2 × 44 + 176 = 99
5. (2 + √7)^2 - 4√7 = 4 + 7 = 11
6. (√6 - √3)^2 + 6√2 = 6 - 2√18 + 3 + 6√2 = 6 + 3 = 9