2 0 x 6 8 July 8, 2019 16 32 64 128 2 0 x 6 8 exterior door 2 0 x 6 8 door 2 0 x 6 8 interior door 2 6 x 4 )= 0 6 x 8 0 2 2 5 6 x 8 X 6 81x 2 0 9 2 x 6 8 x 0 64 1 8x 2 x 6 0 X 2 8x 6 0 complete the square X 2 8x 6 0 completing the square 2 8 1 6 x 0 5 2 8 x 6 0 window 2 3 x 6 )( 8 2x )= 0 2 x 4 x 0 x 6 x minus 8 X 6 2 81 0