1) AB²= (xA-xB)²+ (yA-yB)²
AB²= (4-4)² + (5+1)²=6²
AB=6
AB²= (-1+1)² + (-3+6)²=3²
AB=3
2) nr intregi din interval sunt : -2,-1,0,1,2 -> cel mai mic nr intreg este -2
3) 6x² -4x-3x+2 = 2x(3x-2) - 1(3x-2)= (3x-2) * (2x-1)
2x² -x+4x-2=x(2x-1) + 2(2x-1)= (2x-1) * (x+2)
3x-2/x+2