Factor by grouping.
x2 + 8x + xy + 8y

Don't you see that y is a stranger. So group it -y(x+8) 
The balance just happens to be x(x+8) 
So you have these two terms. Take the common factor out. 
(x+8) (x-y) now that's the answer. Easy ... 

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c