Решите примеры
1. (4√5-5√15)(4√5+5√15)=
2. (√27+3)² =
3. 5√а
--------- =
а+11√а
1. (4√5-5√15)(4√5+5√15)=
2. (√27+3)² =
3. 5√а
--------- =
а+11√а
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Answers & Comments
(а-в)(а+в)=а^2 -в^2
(4V5)^2 -(5V15)^2=
16*5-25*15=80-375=
-295
2.(V27)^2+2V27*3+3^2
=27+6*V9*V3+9=
36+18V3
3.
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