Can someone give me something that can't be factored!

Like it has to take the form a^2 + bx + c

I just need an expression that isn't factorable using the who binomial FOIL thing, but is solvable using the quadratic equation! :P

Question

Can someone give me something that can't be factored! 

Like it has to take the form a^2 + bx + c 

I just need an expression that isn't factorable using the who binomial FOIL thing, but is solvable using the quadratic equation! :P

primeralph · Answer

1,5,3

anonymous · Answer

x^2 + 5x + 3 Can't be factored?

primeralph · Answer

right.

anonymous · Answer

Would you mind sharing why it can't be factored? I would say because you can't have 5x added up and still be multiplied by 3? But that doesn't sound like it makes sense...

primeralph · Answer

because sqrt(5^2 -4(1*3)) is not a rational number.

primeralph · Answer

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