First slide

Cartesian plane

Question

By translating the axes the equation xy - 2x - 3y - 4 = 0 has changed to XY = k, then k =

Moderate

A

-10
B

10
C

4
D

-4

Solution

New origin $(\frac{- f}{h}, \frac{- g}{h})$ $= (3, 2)$
Put x = X+3,y=Y+2 subtute given equation

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