Please answer all the above answers
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Step-by-step explanation:
3. LHS= (a-b)²
= (a-b)(a-b)
= a(a-b)-b(a-b)
= a²-ba-ba+b²
= a²-2ab+b²=RHS
hence,proved
4. SP=CP[100+profit%]/100
2.first term,a=2
2nd term = 2×2-2=2
3rd term=2×3-3=3
4th term = 3×4-4=8
5th term = 8×5-5=35
6th term = 35×6-6=204
7th term = 204×7-7=1421
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