# SOLUTION: Use 0, 1, 2, 3, 4 to substitute for x in the formula x2-x+41; see if prime number occurs then find a number for x that when substituted in the formula yields a composite number.

Algebra ->  Algebra  -> Divisibility and Prime Numbers -> SOLUTION: Use 0, 1, 2, 3, 4 to substitute for x in the formula x2-x+41; see if prime number occurs then find a number for x that when substituted in the formula yields a composite number.       Log On

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 Algebra: Divisibility and Prime Numbers Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Divisibility and Prime Numbers Question 450415: Use 0, 1, 2, 3, 4 to substitute for x in the formula x2-x+41; see if prime number occurs then find a number for x that when substituted in the formula yields a composite number. Answer by Edwin McCravy(8912)   (Show Source): You can put this solution on YOUR website!Use 0, 1, 2, 3, 4 to substitute for x in the formula x²-x+41; see if prime number occurs then find a number for x that when substituted in the formula yields a composite number. x x²- x + 41 prime? 0 0²- 0 + 41 = 41 yes 1 1²- 1 + 41 = 41 yes 2 2²- 2 + 41 = 43 yes 3 3²- 3 + 41 = 47 yes 4 4²- 4 + 41 = 53 yes It's obvious that when 41 is substituted for x, the middle term will cancel the last term leaving 41² which is composite. So when x = 41, x²- x + 41 = 41²- 41 + 41 = 41² = 1681, not prime. Edwin