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michurovaa
@michurovaa
July 2022
1
30
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b+3a a-4b
-------- + --------
18a(2)b 24ab(2) ; ребят, кому не трудно, помогите избавиться от главомучений.
m-4 m-3
------- - -------
m m+1
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litanalove
1) (b+3a)/18a²b +(a-4b)/24ab² =
=(4b(b+3a) +3a(a-4b)) /72a²b² =
=(4b² +12ab +3a² -12ab) /72a²b² =
=(3a² +4b²) /72a²b²
2) (m-4)/m -(m-3)/(m+1) =
=((m -4)(m+1) -m(m -3)) /m(m +1) =
=(m² -3m -4 -m² +3m) /m(m+1) =
= -4 /m(m+1)
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Answers & Comments
=(4b(b+3a) +3a(a-4b)) /72a²b² =
=(4b² +12ab +3a² -12ab) /72a²b² =
=(3a² +4b²) /72a²b²
2) (m-4)/m -(m-3)/(m+1) =
=((m -4)(m+1) -m(m -3)) /m(m +1) =
=(m² -3m -4 -m² +3m) /m(m+1) =
= -4 /m(m+1)