Question 1

Is $y=-\frac{1}{2}x^2-3$ een berg- of een dalparabool?

Accepted Answer

Bergparabool

Answer

Dalparabool

Answer

Dat kun je niet zien

Question 2

Ligt $(6,-14)$ op de grafiek van $y=-\frac{1}{2}x^2-3$?

Accepted Answer

Nee, want $y=-\frac{1}{2}	imes6^2-3=-21$

Answer

Nee, want $y=-\frac{1}{2}	imes6^2-3=-12$

Answer

Nee, want $y=-\frac{1}{2}	imes6^2-3=-15$

Answer

Ja, want $y=-\frac{1}{2}	imes6^2-3=-14$

Question 3

$F(-4,18)$ ligt op  $y=-x^2+b$ . Bereken $b$

Accepted Answer

$b=34$

Answer

$b=2$

Answer

$b=-2$

Answer

$b=10$

Question 4

Bereken: $(3\sqrt6)^2$

Accepted Answer

$54$

Answer

$18$

Answer

$324$

Answer

$9\sqrt6$

Question 5

Bereken: $3\sqrt9+7\sqrt16=$

Accepted Answer

$37$

Answer

$50$

Answer

kan niet

Question 6

Bereken: $(-5\sqrt2)^2-3(\sqrt3)^2$

Accepted Answer

$41$

Answer

$-19$

Answer

$23$

Answer

$-59$

Question 7

Bereken: $3\sqrt5	imes2\sqrt6=$

Accepted Answer

$6\sqrt30$

Answer

$5\sqrt30$

Answer

$6\sqrt11$

Answer

kan niet

Question 8

Bereken: $2\sqrt3+5\sqrt3$

Accepted Answer

$7\sqrt3$

Answer

$7\sqrt6$

Answer

$10\sqrt3$

Answer

$7	imes(\sqrt3)^2=21$

Question 9

Bereken: $6\sqrt2-2\sqrt6$

Accepted Answer

$6\sqrt2-2\sqrt6$

Answer

$4\sqrt12$

Answer

$24\sqrt3$

Answer

$12\sqrt12$

Question 10

Bereken: $(5-\sqrt2)(5+\sqrt2)$

Accepted Answer

$25-2=23$

Answer

$25-4=21$

Answer

$25-10\sqrt2-2=23-10\sqrt2$

Answer

$25-10\sqrt2+2=27-10\sqrt2$

Question 11

Bereken: $(4\sqrt2-3)^2$

Accepted Answer

$32-24\sqrt2+9=41-24\sqrt2$

Answer

$32-12\sqrt2+9=41-12\sqrt2$

Answer

$16-24\sqrt2+9=25-24\sqrt2$

Answer

$32-24\sqrt2-9=23-24\sqrt2$

Question 12

Bereken: $\dfrac{30\sqrt{40}}{12\sqrt2}$

Accepted Answer

$2\frac{1}{2}\sqrt{20}=2\frac{1}{2}\sqrt{4}	imes\sqrt{5}=5\sqrt5$

Answer

$2\frac{1}{2}\sqrt{20}=2\frac{1}{2}\sqrt{4}	imes\sqrt{5}=10\sqrt{5}$

Answer

$\sqrt{\dfrac{1200}{24}}=\sqrt{50}=5\sqrt2$

Answer

$\dfrac{30}{12}\sqrt{\dfrac{40}{2}}=2\frac{1}{2}\sqrt{20}$

Question 13

Bereken: $\sqrt{4\frac{21}{25}}$

Accepted Answer

$\frac{11}{5}$

Answer

$\sqrt4	imes\sqrt{\frac{21}{25}}=2\sqrt{\frac{21}{25}}$

Answer

$2\frac{21}{25}$

Answer

geen idee... kan dit wel dan?

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