Question

please answer me fast​

Answer 1

Answer:

3x^2 + 4y^2- 5z^2 +4xy + 2xz + zy

Step-by-step explanation:

(3x + 4y + 5z) (x + y - z)

x( 3x + 4y + 5z ) + y ( 3x + 4y + 5z ) - z ( 3x + 4y + 5z )

3x^2 + 4xy + 5xz + 3 xy + 4y^2 + 5 zy - 3zx - 4yz - 5z^2

3x^2 + 4y^2- 5z^2 +4xy + 2xz + zy