Which of the following functions has three roots? (1 point) Responses y=6x6+8x3−x+3 y equals 6 x superscript 6 baseline plus 8 x cubed minus x plus 3 y=x4−x2+15 y equals x superscript 4 baseline minus x squared plus 15 y=3x8+9x6−5x+12 y equals 3 x superscript 8 baseline plus 9 x superscript 6 baseline minus 5 x plus 12 y=8x3+x2−2x+1