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Sagot :
[tex]\begin{gathered} \text{ 140ab - 60a}^2\text{ + 168b - 72a} \\ \text{ }20a(7b\text{ - 3a) }+\text{ }24(7b\text{ - 3a)} \\ (7b\text{ - 3a) (20a - 24)} \\ 4(7b\text{ - 3a)(5a - 6)} \\ \end{gathered}[/tex]
140 60 2
70 30 2
35 15 3
35 5 5 LCF = 2 x 2 x 5 = 20
7 1 7
1
168 72 2
84 36 2
42 18 2
21 9 3 LCF = 2 x 2 x 2 x 3 = 24
7 3 3
7 1 7
1
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