Welke gelijkheid is correct ?
A. a
2
− 1 = (a − 1)
2
B. a
2
+ 1 = (a + 1)(a + 1)
C. a
2
+ a = a (a + 1)
D. (a + 1)
2
= a
2
+ 1
E. a
2
− 1 = 1 − a
2
[ 1447 - op net sinds 30.3.2020-()-3.1.2025 ]
Translation in E N G L I S H
Which equality is correct ?
Oplossing - Solution
Enkel C is correct (a buiten haken brengen)
