Given that point a (a-2,2b + 1) is a point in Cartesian coordinate system, its symmetric point about origin is B (- 2, - 5), try to find the arithmetic square root of ab The process of calculation

Given that point a (a-2,2b + 1) is a point in Cartesian coordinate system, its symmetric point about origin is B (- 2, - 5), try to find the arithmetic square root of ab The process of calculation

The ordinates and abscissa of the symmetric point about the origin are opposite to each other
a-2=2,2b+1=5
So a = 4, B = 2
√ab=2√2
I hope it can help you