5. a) If x² + y2 + z = xy + yz + zx, show that a**- y ayy-2 a Z-X = 1 a" a* ay​

Which number is located at point a on the number line? a number line is shown from negative 10 to 10 with each interval mark on the number line representing one unit. point a is labeled one interval mark to the right of negative 5.