show that (7*6*5*4*3*2*1+5)is a composite number
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Step-by-step explanation:
7× 6 × 5 × 4 × 3 × 2 × 1+ 5
= 5 ( 7× 6 × 4 × 3 × 2 × 1 + 1 )
= 1 × 5 × ( 7 × 6 × 4 × 3 × 2 × 1 + 1 )
As the expansion 7× 6 × 5 × 4 × 3 × 2 × 1+ 5 has more than two factors .Its a composite number. A prime numbers has only two factors, one and itself .A composite number has more than two factors
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