Raymond B. answered 04/03/21
Math, microeconomics or criminal justice
depends, on how you connect the variables in each factor
(2r+5)(5r+2) = 10r^2 +29r +10
(2r-5)(5r-2) = 10r^2 -29r +10
or
(2r+5)(5r-2) = 10r^2 +21r -10
(2r-5)(5r+2) = 10r^2 -21r -10
or maybe you just meant
(2r^5)(5r^2) = 10r^7
that last possibility looks more likely, as written