Question

@GoldPhenoix

Answer 1

\[\large \large (5x^4 + 8x^3 -6) - (8x^2 - 3x + 4)\]
Another way of writing this (Without the parenthesis): \[\large \large 5x^4 + 8x^3 -6 - 8x^2 + 3x - 4\] How did I get this? Well, the parenthesis in the beginning stays the same. The second parenthesis changes, since it's being subtracted. The trick is to change the operation sign. So 8x^2 becomes a negative.
-3x becomes positive, and so on. (I hope you understand this)
So to simplify this, we must combine like term.
We can combine -6 and -4.
-6 + -4 = -10.
So we would get:\[\large \large 5x^4 + 8x^3 - 8x^2 + 3x - 10\] Can we combine any further? Nope. Why? Well, the exponent are different. So there's no like term.