Answer
Answers may vary, and two possible answers are provided.
-41: $8r^2-41r-42 = (8r-42)(r+1)$
-34: $8r^2-34r-42 = (4r-21)(2r+2)$
Work Step by Step
$8r^2+xr-42$
$(8r-42)(r+1) = 8r^2-42r+r-42 = 8r^2-41r-42$
$(4r-21)(2r+2) = 8r^2 +8r-42r -42 = 8r^2-34r-42$
