You are here:

# Advanced Math/Lines and planes in space

Question
Hi, I have been doing my webworks and I seem to be having problems with this remaining question. Any help would be greatly appreciated.

Find an equation for the plane containing the points A(0,4,2) and B(-5,0,7)and perpendicular to the plane 2x+2y+4z=3

Questioner:   Thomas
Private:   No
Subject:   Help with homework questions
Question:   Hi, I have been doing my webworks and I seem to be having problems with this remaining question. Any help would be greatly appreciated.

Find an equation for the plane P1 containing the points A(0,4,2) and B(-5,0,7)and perpendicular to the plane P2 : 2x+2y+4z=3
.....................................................
1. AB is a vector in the plane P1.
2. <2,2,4> (or <1,1,2>, just as good) is normal to the second plane P2, therefore parallel to P1.
3. Their cross-product will be normal to P1.

You should be able to do it now.

Volunteer

#### Paul Klarreich

##### Expertise

I can answer questions in basic to advanced algebra (theory of equations, complex numbers), precalculus (functions, graphs, exponential, logarithmic, and trigonometric functions and identities), basic probability, and finite mathematics, including mathematical induction. I can also try (but not guarantee) to answer questions on Abstract Algebra -- groups, rings, etc. and Analysis -- sequences, limits, continuity. I won't understand specialized engineering or business jargon.

##### Experience

I taught at a two-year college for 25 years, including all subjects from algebra to third-semester calculus.

Education/Credentials
-----------