Question

Wylicz i zaznacz na osi :
(x-3) * (x-7) ≥ (x-1) * (x-1)

Answer 1

(x-3)*(x-7)≥(x-1)*(x-1)

x 'do kwadratu' -7x-3x+21≥x'Do kwadratu' -x-x+1

-10x+21≥-2x+1

-8x≥-20 |:(-8)
5/4≥x

Answer 2

Link lub załącznik, jak wolisz :)

 

http://img28.imageshack.us/img28/1179/skan0003.jpg