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карандашенцыя
@карандашенцыя
March 2022
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Упростите вырадения (9+2а)^2-(9-2а)^2
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ShirokovP
Verified answer
81 + 36a + 4a^2 - (81 - 36a + 4a^2) =
=
81
+ 36a +
4a^2
-
81
+ 36a -
4a^2
=
= 72a
1 votes
Thanks 1
Глокси
(9+2a)²-(9-2a)²=(9+2a-9+2a)(9+2a+9-2a)=4a*18=72a или
81+36a+4a²-81+36a-4a²=72a
0 votes
Thanks 0
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Answers & Comments
Verified answer
81 + 36a + 4a^2 - (81 - 36a + 4a^2) == 81 + 36a + 4a^2 - 81 + 36a - 4a^2 =
= 72a
81+36a+4a²-81+36a-4a²=72a