Question

решите неравенства : (1-t)^2-t^2>3, m^2+9<(1-m)^2

Answer 1

1) 1-2t+t^2>3

1-2t>3

-2t>3-1

-2t>2

t<-1

2)m^2+9<1-2m+m^2

9<1-2m

2m<1-9

2m<-8

m<-4