De oplossing van
de vergelijking

(x + 2)2 + 2 = (x + 2)(x − 2)

is 		A.   − 5
B.   2
C.   1,5
D.   − 2
E.   − 2,5
A    B    C    D    E 

[ 4-4099 - op net sinds 11.12.04-(E)-29.10.2023 ]

Translation in   E N G L I S H

What is the solution
of the next equation ?

(x + 2)2 + 2 = (x + 2)(x − 2)
 A.   2.5
B.   2
C.   1.5
D.   − 2
E.   − 2.5

Oplossing - Solution

  (x + 2)² + 2 = (x + 2)(x − 2)
 ⇔  x² + 4x + 4 + 2 = x² − 4
 ⇔  4x = − 4 − 4 − 2 = −10
 ⇔  x = −2,5
gricha