(8x³-3x²+x-9)+3x²+6x-15)
Remove unnecessary parentheses
8x³-3x²+x-9+3x²+6x-15
Since -3x² and 3x² are the same you can remove them in a expression
=8x^3 + x-9+ 6x - 15
Add x and 6x
=x+ 6x =7x
=8x^3 + 7x - 9 - 15
=8x^3 +7x - 24
Final answer:=8x^3 +7x - 24
(8x³-3x²+x-9)+3x²+6x-15)
=8x³-3x²+x-9+3x²+6x-15
=8x^3 + x-9+ 6x - 15
=8x^3 + x-9+ 6x - 15
(=x+ 6x =7x)
=8x^3 + 7x - 9 - 15
=8x^3 +7x - 24
Final answer :=8x^3 +7x - 24
Hope it helps
