When factoring a trinomial of the form $ax^2 + bx + c$ using the AC method, you must find two numbers. What properties must these two numbers have?

They must multiply to $c$ and add to $b$.

They must multiply to $a$ and add to $b$.

They must multiply to $ac$ and add to $b$.

They must multiply to $ac$ and add to $c$.

To factor the trinomial $6x^2 + 19x + 10$ using the 'ac' method, which pair of numbers should be used to split the middle term?

Two numbers that multiply to 60 and add to 19

Two numbers that multiply to 10 and add to 19

Two numbers that multiply to 60 and add to 10

Two numbers that multiply to 16 and add to 19