(3y^3 + 6) - ( y^3 + 4y^2 - 3y - 7)
Notice the subtraction sign
That actually is a "multiply by negative 1"
So distribute the negative 1 like you normally distribute.
Then remove parentheses and combine like terms. Try it.
I personally have a big problem remembering to distribute negatives. This has caused me to fail a "few" problems...
thx, this is a polynomial problem and it is subtraction.
2y^3 + 4y^2 - 3y - 1 is the answer.