Answer:
r = -1/3 and r = 3/5
Explanation:
Given the expression 15r^2-6r-3 = -2r
collect the like terms
15r^2-6r+2r-3 = 0
15r^2-4r-3 = 0
Factorize
15r^2-9r+5r-3 = 0
3r(5r-3)+1(5r-3) = 0
(3r+1)(5r-3) = 0
3r+1 = 0 and 5r-3 = 0
3r = -1 and 5r = 3
r = -1/3 and r = 3/5