9x3 − 81x = A.   9x(x − 3)(x + 3)
B.   9x(x − 1)(x + 3)
C.   (3x2 − 9x)(3x2 + 9x)
D.   9x2(x − 9)
E.   9x(x − 3)2
A    B    C    D    E

[ 2-6051 - op net sinds 6.4.10-(E)-22.10.2023 ]

Translation in   E N G L I S H

See above

Oplossing - Solution

Eerst de factor 9 buiten haken brengen : 9x³ − 81x = 9(x² − 9) = 9(x − 3)(x + 3)
GWB