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Factoring trinomials worksheet

Factor x² + bx + c. Harder sets have a number in front of x². Free, printable, and the answer key prints on its own page, so the work comes first.

How to solve them

1. For x² + bx + c, find two numbers that multiply to c and add to b.
2. Write them as (x + first)(x + second).
3. Check by multiplying the brackets back out.

New to this? The short lesson on it has the rules in one place.

Check the key only once you've finished. A wrong answer is useful: find the first line where your working went wrong, fix that, and redo the problem.