(Х-4)•(х+9)>(х+12)•(х-7)

Question

(Х-4)•(х+9)>(х+12)•(х-7)

Answer 1

Х^2+9х-4х-36>х^2-7х+12х-84
х^2+9х-4х-х^2+7х-12х>-84+36
16х>-48
х>-48:16
х>-3