(7x-12)^2-5(7x-12)+6=0
((7x-12)^2-(35x-60))+6=0
49x^2-203x+210=0
d=-203^2-4*49*210=49 √49=7
x1,2=(203+-7)/49*2=15/7;2.
(7x-12)^2-5(7x-12)+6=0
((7x-12)^2-(35x-60))+6=0
49x^2-203x+210=0
d=-203^2-4*49*210=49 √49=7
x1,2=(203+-7)/49*2=15/7;2.