Answer:
Step-by-step explanation:
28
1.
2.
7 and 9
7 x 9 = 63
7+9=16
63-16 = 47
Add the like terms:
8x2+x2=9x2
-9y2-3y2=-12y2
-4x-7x=-11x
Combine each term:
9x2-12y2-11x
Hope this helps!!