If a= -1 -3 b= 11 -8 what is the lenght of ab

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

What is the least common factor of 6 and 8

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2