Add: 2x(z-x-y)and2y(z-y-x)
To add : 2x(z-x-y)and2y(z-y-x)
Firstly we will multiply the common term with the brackets given, and then add the like terms with one another, we have
=2x(z–x–y)+2y(z–y–x)=(2x×z)–(2x×x)–(2x×y)+(2y×z)–(2y×y)–(2y×x)=2xz–2x2–2xy+2yz–2y2–2yx=2xz–4xy+2yz–2x2–2y2
Hence, On adding 2x(z-x-y)and2y(z-y-x) , we get 2xz-4xy+2yz-2x2-2y2.
Question 5(b) Add : 2x (z - x - y ) and 2y (z - y - x)