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tatuanamashuri
@tatuanamashuri
July 2022
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Найдите значение выражения
(4а + 1) ^2 - 2(4а +1)(1 - 2а) + (1 - 2а)^2 при а = -2,5
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ShirokovP
Verified answer
16a^2 + 8a + 1 - 2(4a - 8a^2 + 1 - 2a) + (1 - 4a + 4a^2) =
= 16a^2 +
8a
+
1
-
8a
+ 16a^2
- 2
+
4a
+
1
-
4a
+ 4a^2 =
= 36a^2
a = - 2,5
36*(-2,5)^2 = 225
2 votes
Thanks 1
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Answers & Comments
Verified answer
16a^2 + 8a + 1 - 2(4a - 8a^2 + 1 - 2a) + (1 - 4a + 4a^2) == 16a^2 + 8a + 1 - 8a + 16a^2 - 2 + 4a + 1 - 4a + 4a^2 =
= 36a^2
a = - 2,5
36*(-2,5)^2 = 225