SOLUTION: Factor 140 into the product of primes

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factor 140 into the product of primes      Log On


   

Question 71310: Factor 140 into the product of primes
Answer by galactus(183) About Me  (Show Source):
You can put this solution on YOUR website!
Start by dividing by 2: 140/2=70
As long as you can, divide by 2 again: 70/2=35
2 does not divide into 35, so you have to pick the next prime that will...5
35/5=7. 7 is prime and so is 5. You used 2 twice. Therefore, the prime factorization is 2%5E2%2A5%2A7