1. Reduce the length of a rectangle with length x and width y by 1, and increase the width by 1, then its area will increase_____ . 2. If the polynomial (MX + 8) (2-3x) is expanded without x term, then M=_____ .

1. Reduce the length of a rectangle with length x and width y by 1, and increase the width by 1, then its area will increase_____ . 2. If the polynomial (MX + 8) (2-3x) is expanded without x term, then M=_____ .


1. The original area XY is (x-1) (y + 1) after the change
Then the area increases XY - (x-1) (y + 1) = Y-X + 1
2.m=12