Question

Решите неравенство
x^2-7x+12<0

x^2-6x-27<0

x^2-17x+72<0

Answer 1

1)D=7^2-4*1*12=49-48=1
x1=7+12=82=4
x2=7-12=62=3
Ответ:4;3
2)D=-6^2-4*1*(-27)=36+108=144=12
x1=12+62=182=9
x2=12-62=62=3
Ответ:9;3

Answer 2

3)D=-17^2-4*1*72=289-288=1

Answer 3

x2=17-12=162=8