5a(b-c)-8(b-c) in full answer
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Answer:
DE∥BC
DE=5cm
BC=8cm
AD=3.5cm
Since, DE∥BC
∴
AB
AD
=
AC
AE
=
BC
DE
⇒
AB
3.5
=
8
5
⇒ AB=
5
3.5×8
∴ AB=5.6cm
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