Answer:
1.67 and -1.25
Explanation:
the quadratic formula is -b+-√b^2-4ac/2a
first you need to add the 4r to both sides so the equation will equal 0
so its 12r^2-5r-25
and lets plug it into the formula
-b = 5; b^2 = 25; 4ac = 1200 and its positive cause -*-=+; and 2a=24
5+-√25+1200/24 = 5+-35/24
so your 2 equation are 5+35/24 and 5-35/24
and the answers would be 1.67 and -1.25