Question

solve this problem...... please​

Answer 1

Answer:

iii) x²+ y²+4z²-2xy +4xz-4yz

Step-by-step explanation:

(x-y+2z)²= x²+y²+(2z)²- 2.x.y +2.x.2z -2.y.2z =x²+y²+4z²-2xy+4xz-4yz