Question

(4х-3)^2+(3х-7)^2(5х+1)^2+5^2+4х-123

Answer 1

16х²-24х+9+9х²-42х+49≤25х²+10х+1+4х-123
25х²-25х²-66х-14х≤122-58
-80х≤-180
х≥180/80
х≥9/4