prove that 5×7 + 7×3 + 5 is a composite number
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To prove:5×7 +7×3+5
=5(7+1×3×5)
=5(7×15)
=5(105)
=525
these number is having two factors 5 and 105
therefore it is composite number
nikitabhatia395:
thanks!
well wait a second, how did you take 7 out when you have taken 5 as common
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