Wiskunde Multiple Choice Vraag uit Gricha's Wiskundige Vragenbank

Eén van de oplossingen van de vierkantsvergelijking x² − 2x − 6 = 0 is	A. $https://latex.codecogs.com/png.image?\inline \dpi{120}\1-\sqrt 7$
	B. $https://latex.codecogs.com/png.image?\inline \dpi{120}1-\sqrt 7$
	C. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$
	D. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$
	E. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$

[ 4-3281 - op net sinds 24.10.01-(E)-30.10.2023 ]

Translation in E N G L I S H

One of the solutions of the quadratic equation x² − 2x − 6 = 0 is	A. $https://latex.codecogs.com/png.image?\inline \dpi{120}\1-\sqrt 7$
	B. $https://latex.codecogs.com/png.image?\inline \dpi{120}1-\sqrt 7$
	C. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$
	D. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$
	E. $https://latex.codecogs.com/png.image?\inline \dpi{120}1+2\, \sqrt 7$

Oplossing - Solution

x² − 2x − 6 = 0 heeft als discriminant D = 4 + 28 = 30 = 4.7
De oplossingen zijn x_1,2 = 1/2

1/2

(2 ± 2

) = 1 ±