Simplify (x − 1)(x2 + 5x + 2).
x3 + 6x2 + 7x − 2
x3 + 4x2 − 3x − 2
x3 − x2 + 2x − 2
x3 + 5x2 − 6x − 2

Which lines are parallel? justify your answer. lines p and q are parallel because same side interior angles are congruent. lines p and q are parallel because alternate exterior angles are congruent lines l and m are parallel because same side interior angles are supplementary lines l and m are parallel because alternate interior angles are supplementary.