Question

решите неравенство |x-1|<12

Answer 1

x-1<12
x-1-12<0
x-1-12=0

D=1+48

D=49
X1,2=1±√49÷2

X1=1+7÷2 

X1 = 4

X2=1-7÷2

X2=-3
(x-4)(x+3)<0
-3<x<4