Mathematics

The key is recognizing this as a quadratic trinomial where the leading coefficient isn't 1. You need two numbers that multiply to $3 \times 6 = 18$ and add to $11$—that's your "AC method" shortcut. Once you find them, use those numbers to split the middle term and factor by grouping, which will reveal the two binomial factors hiding inside.

The key is recognizing this as a quadratic trinomial where the leading coefficient isn't 1. You need two numbers that multiply to $3 \times 6 = 18$ and add to $11$—that's your "AC method" shortcut. Once you find them, use those numbers to split the middle term and factor by grouping, which will reveal the two binomial factors hiding inside.