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October 23, 2014

October 23, 2014

Posted by **Lana Von Monroe** on Tuesday, April 10, 2012 at 10:43pm.

values of x

x: x2+x+5:

1 7

2 11

6 47

7 61

Josiah concluded that for all positive values of x, x2+x+5 produces a prime number. Which value of x serves as a counterexample to prove Josiah’s conclusion false?

A: 5

B: 11

C: 16

D: 21

- Math 8th Grade -
**drwls**, Tuesday, April 10, 2012 at 11:06pmTry each one see which one isn't prime. You won't have to go far down the list.

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