Х(8-3х)+11 меньше 3(7-х)(х+7)+8

Question

Х(8-3х)+11 меньше 3(7-х)(х+7)+8

Answer 1

8x-3x^2+11 <3 (7x+49-x^2-7x)+8<br>8x-3x^2+11 <21x+147-3x^2-21x +8<br>8x+11 <155<br>8x <144<br>x <18