Oblicz:1. (√2+1)(√2-1)
2, (8-5√3)(8+5√3)
3, (√π-√2)(√π+√2)(π+2)
1. (√2+1)(√2-1) = √2² - 1² = 2 - 1 = 1
2, (8-5√3)(8+5√3) = 8² - (5√3)² = 64 - 75 = - 11
3, (√π-√2)(√π+√2)(π+2) = (√π² - √2²)(π + 2) = (π - 2)(π + 2) = π² - 2² = π² - 4
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1. (√2+1)(√2-1) = √2² - 1² = 2 - 1 = 1
2, (8-5√3)(8+5√3) = 8² - (5√3)² = 64 - 75 = - 11
3, (√π-√2)(√π+√2)(π+2) = (√π² - √2²)(π + 2) = (π - 2)(π + 2) = π² - 2² = π² - 4