First one :
17x3+3x+8x3
=17x3+3x+8x3
=(17x3+8x3)+(3x)
Answer is =25x3+3x
Hoped I helped!
Second one :
8x2+17x+6x2
Combine Like Terms:
=8x2+17x+6x2
=(8x2+6x2)+(17x)
=14x2+17x
=14x2+17x
Third one ;
(13x2 + 5x) + 8x2
13x2+5x+8x2
=13x2+5x+8x2
=(13x2+8x2)+(5x)
=21x2+5x
Your answer is 21x2+5x.
