Which of the following quartic functions has x=-1 and x=2 as its only two real zeros?(1 point)
Responses
x4+x3+x2+3x+6
x to the 4th power plus x cubed plus x squared plus 3 x plus 6
x4−x3+x2−3x−6
x to the 4th power minus x cubed plus x squared minus 3 x minus 6
x4−x3−x2−3x−6
x to the 4th power minus x cubed minus x squared minus 3 x minus 6
x4+x3+x2−3x−