De oplossing van
de vergelijking
v5x = v3x + 32   is
A.  16
B.  2.(v5 + v3)
C.  16.(v5 + v3)
D.  4
E.  4.(v5 + v3)
A    B    C    D    E 

[ 3-4420 - op net sinds 30.3.2020-(E)-24.10.2023 ]

Translation in   E N G L I S H

What is the solution
of the equation
v5x = v3x + 32
A.   16
B.   2.(v5 + v3)
C.   16.(v5 + v3)
D.   4
E.   4.(v5 + v3)

Oplossing - Solution

$$ \begin{aligned} & \sqrt{5}\, x=\sqrt{3}\, x+32 \\ \Leftrightarrow & \; \sqrt{5}\, x -\sqrt{3}\, x=32 \\ \Leftrightarrow & \; ( \sqrt{5}\, x -\sqrt{3} ) \, x=32 \\ \Leftrightarrow & \; x=\frac{32}{\sqrt{5}\, -\sqrt{3}} \\ \Leftrightarrow & \; x = \frac{32\cdot (\sqrt{5}\, +\sqrt{3})} {(\sqrt{5}\, -\sqrt{3}).(\sqrt{5}\, +\sqrt{3})} \\ \Leftrightarrow & \; x=\frac{32\cdot (\sqrt{5}\, +\sqrt{3})} {5-3} \\ \Leftrightarrow & \; x = 16 \cdot (\sqrt{5}\, +\sqrt{3}) \end{aligned} $$
gricha