SOLUTION: The sides of a square table is measured at 3x-y+4z meters. What is the area? I just want to know if my answer is correct. My answer is 9x^2 + y^2 + 16z^2 - 6xy + 24xz - 8yz

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The sides of a square table is measured at 3x-y+4z meters. What is the area? I just want to know if my answer is correct. My answer is 9x^2 + y^2 + 16z^2 - 6xy + 24xz - 8yz       Log On


   

Question 624464: The sides of a square table is measured at 3x-y+4z meters. What is the area?
I just want to know if my answer is correct. My answer is 9x^2 + y^2 + 16z^2 - 6xy + 24xz - 8yz
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

%283-4%2B4z%29%5E2 = (3x - y + 4z)(3x - y + 4z)

                 = 3x(3x - y + 4z)-y(3x - y + 4z)+4z(3x - y + 4z)

                 = 9x^2 - 3xy +12xz - 3xy + y^2 - 4yz + 12xz - 4yz + 16z^2

Yes Good work!   = 9x^2 + y^2 + 16z^2 - 6xy + 24xz - 8yz