Question

ysquare+3yz-3zsquare-2ysquare+yz​

Answer 1

Step-by-step explanation:

${y}^{2 \: } + 3yz - 3 {z}^{2} - 2 {y}^{2} + yz$

${y}^{2} - 2 {y}^{2} + 3yz + yz - 3 {z}^{2}$

$- {y}^{2} + 4yz - 3 {z}^{2}$