Question

The value of k for which the pair of equa-
tions 3x + 4y + 2 = 0 and 9x + 12y + k = 0
represent coincident lines is​

Answer 1

if we take

x=2 , y =(-2)

9x+12y + k= 0

9×3+12×(-2)+k=0

18+(-24)+k=0

-6+k=0

k=0+6

k=6

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