Ա) (x-1) (x-34), x = 11 <0

Բ) (x-3) (x-0.7), x = 2.2 <0

Գ) (x+2) (x — 7), x =9 >0

Դ) (x-4) (x-9), x = — 9>0

Ե) (x+5) (x-8), x = -10 >0

Զ) (x-5) (x+10), x = 6 >0