Ответ:
1. а) 6√3 + √27 - 3√75= 6√3 + 3√3 - 15√3 = -6√3
б) (√50 - 2√2)√2 = (5√2 - 2√2)√2 = 3√2 * √2 = 6
в) (2 - √3)^2 = 4 - 6√3 + 3 = 7 - 6√3
2. 1/2 √12 < 1/3√45
√1/4*12=√3
√1/9*45=√5
√3 < √5
3. a) √3-3/√5 - √15 = √3-3/√5 - (√3*√5) = -3/√5-√5
4. a) 5/3√10 = 5√10/30 = √10/6
b) 8/√6 + √2 = 8/(√6+√2)=8*(√6-√2)/(√6+√2)(√6-√2)=8*(√6-√2)/(6-2)=8*(√6-√2)/4=2(√6-√2)
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Answers & Comments
Ответ:
1. а) 6√3 + √27 - 3√75= 6√3 + 3√3 - 15√3 = -6√3
б) (√50 - 2√2)√2 = (5√2 - 2√2)√2 = 3√2 * √2 = 6
в) (2 - √3)^2 = 4 - 6√3 + 3 = 7 - 6√3
2. 1/2 √12 < 1/3√45
√1/4*12=√3
√1/9*45=√5
√3 < √5
3. a) √3-3/√5 - √15 = √3-3/√5 - (√3*√5) = -3/√5-√5
4. a) 5/3√10 = 5√10/30 = √10/6
b) 8/√6 + √2 = 8/(√6+√2)=8*(√6-√2)/(√6+√2)(√6-√2)=8*(√6-√2)/(6-2)=8*(√6-√2)/4=2(√6-√2)