What is the center and radius of the circle with equation x2 + y2 + 6x + 16y + 64 = 0?

Hello,
 
By making factors:

The answer is mathg.a.y

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.