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00919
@00919
July 2022
2
6
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Найдите значение выражения
a^2−81/2a^2−18а
при а = -0,1.
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Answers & Comments
MizoriesKun
A²−81/2a²−18а=(
a−9)(а+9) / 2a(а−9)=а+9 / 2а
0 votes
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LanceAnderson
A^2-81.....=.(a-9)^2..=.a+9 при a=-0.1
2a^2-18a....2a(a-9).....2a
-0.1+9..=..98..=..-49
2*(-0.1)....-2.
Ответ: -49
1 votes
Thanks 0
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Answers & Comments
2a^2-18a....2a(a-9).....2a
-0.1+9..=..98..=..-49
2*(-0.1)....-2.
Ответ: -49