nomer 3 4 5 6 7 8 aja dulu

3. Suku 1= 2x²
Suku 2=6xy
Suku 3= -3y²
Suku 4= -7x²
Suku 5= 8xy
Suku 6 = 4y²
4. (7x-6y-3z)+(-9x+7y+10z)
=7x-6y-3z-9x+7y+10z
=7x-9x-6y+7y+10z-3z
=-2x+y+7z
5. 6y-4x-5-(6x-4y+8)
=6y-4x-5-6x-4y+8
=6y-4y-4x-6x-5+8
=2y-10x+3
6. (X+5)(6x-2)
=6x²-2x+30x-10
=6x²+28x-10
7. Ada di foto
8. 9y²-4xy+5y+7y²+3y
=9y²+7y²+5y+3y-4xy
=16y²+8y-4xy