Question

Give answer fast of maths class 7​

Answer 1

Answer:

-3y²+2yz+z²

Step-by-step explanation:

[(2y²+3yz)+(-y²-yz-z²)+(yz+2z²)]-[(3y²-z²)+(-y²+yz+z²)]

[2y²+3yz-y²-yz-z²+yz+2z²]-[3y²-z²+y²+yz+z²]

2y²+3yz-y²-yz-z²+yz+2z²-3y²+z²-y²-yz-z²

(2-1-3-1)y²+(3-1+1-1)yz+(-1+2+1-1)z²

-3y²+2yz+z²