a² − b² + a + b =
A. (a + b) . (a - b)
B. (a - b) . (a - b)
C. (a + b) . (a - b + 1)
D. (a + b)² . (a + b + 1)²
E. (a - b)² . (a - b -1)²
F. (a + b)² (a - b)
[ 3-8142 - op net sinds 29.1.2017-()-27.10.2023 ]
Translation in E N G L I S H
IN CONSTRUCTION
A.
B.
C.
D.
E.
F.
Oplossing - Solution