Hello!
Yes, (x + 1) is a factor of (3x³ + x² + 2x + 4).
We can use synthetic division to verify that x + 1 is a factor:
Put a -1 outside of the bracket to use as our divisor since x + 1 has a root at -1:
Use synthetic division to proceed. Since the remainder is 0, (x + 1) is a perfect factor in this polynomial.
