a
2
+ b
2
=
A. (a − b)
2
+ 2ab
B. (a + b)
2
+ 2ab
C. (a + b)
2
− 4ab
D. (a + b)
2
E. (a − b)
2
− 2ab
[ 7132 - op net sinds 6-3.13-(E)-29.10.2023 ]
Translation in E N G L I S H
a
2
+ b
2
=
A. (a − b)
2
+ 2ab
B. (a + b)
2
+ 2ab
C. (a + b)
2
− 4ab
D. (a + b)
2
E. (a − b)
2
− 2ab
Oplossing - Solution
a² + b² = a² − 2ab + b² + 2ab = (a − b)² + 2ab
