JEE Math Practice Question
If the line, $${{x - 3} \over 2} = {{y + 2} \over { - 1}} = {{z + 4} \over 3}\,$$ lies in the planes, $$lx+my-z=9,$$ then $${l^2} + {m^2}$$ is equal to :
- A.$$5$$
- B.$$2$$
- C.$$26$$
- D.$$18$$
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