Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

I got this question from a past exam paper does the point (8 , 4 , -5) lie on the plane 7x - 3y + 4z = 8?

Do you work it out as follows because cant find this example in my Linear Algeria book?

7(8) - 3(4) + 4(-5) = 8

56 - 12 - 20 = 8

24 is not equal to 8

Therefore the following point does not lie on the plane.

Thanks

Stephen

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Does the following point lie on plane?

**Physics Forums | Science Articles, Homework Help, Discussion**