3x(2x-1)=0: x=0 or ½
x(x+3)=0: x=0 or -3
3m(m-4)=0: m=0 or 4
(r-3)(r+2)=0: r=3 or -2
(4m+8)(m-3)=0: 4m=-8, m=-2; or m=3
(4c+2)(2c-7)=0: 4c=-2, c=-½; or c=7/2=3½
5p-15p2=0=5p(1-3p): p=0 or ⅓
4y2=28y, 4y²-28y=0=4y(y-7): y=0 or 7
8y=12y2, 8y-12y²=0=4y(2-3y): y=0 or ⅔
((4a+3)(8a+7)=0: a=-¾ or -⅞
(6-4y)(y+3)=0? then 4y=6, y=6/4=3/2=1½; or y=-3
(12a+4)(3a-1)=0: a=-⅓ or ⅓