Răspuns:
a) B-A= (x-2)(x+3) - (x+1)(x-2)= (x-2)(x+3-x-1)
=2(x-2)
b) (x-2)(x+3)=6
(x+1)(x-2)=3
- - - - - - - - - (-)
2(x-2)=3
2x-4=3/+4
x=3.5
Esti sigura ca n trebuia sa fie nat?
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Răspuns:
a) B-A= (x-2)(x+3) - (x+1)(x-2)= (x-2)(x+3-x-1)
=2(x-2)
b) (x-2)(x+3)=6
(x+1)(x-2)=3
- - - - - - - - - (-)
2(x-2)=3
2x-4=3/+4
x=3.5
Esti sigura ca n trebuia sa fie nat?