Question

i need this answers ​

Answer 1

Answer:

8.ans - 9 cm

Step-by-step explanation:

8.ans- area of square = side× side

= 3cm × 3 cm= 9 cm

9.ans- like terms= -xy2 ,-4yx2 , 5xy2 , 3yx2

unlike terms= 8x2 , 7x2