Simplify the following expression by combining similar terms:?

Question

2t^9-3w^4+2t^9+4w^4

how to solve
i know how to combine
just not how to do the ^ part
it keeps saying the answer is wrong

3p^7-4p^8+15p^7+10p^9+10p^8+6p^9

please explain steps

Answer 1

To simplify this expression, you need to look at the exponent and the base. If both the base and the exponent is the same, then you can add or subtract.

For this problem 2t^9 has the base of t and the exponent of 9
and -3w^4 and 4w^4 have both the base of w and exponent of 4.

So you can combine 2t^9 and the other 2t^9 by 2t^9 + 2t^9 = 4t^9.
and you can combine 4w^4 and -3w^4 by 4w^4 - 3w^4 = 1w^4.

Then you can put the rest together 4t^9 + 1w^4 = 4t^9 + w^4

And that's the answer.

Answer 2

just let t^9 = x, and w^4=y, so you would get it easier
2t^9-3w^4+2t^9+4w^4
2x-3y+2x+4y
4x+y
4t^9+w^4

Answer 3

2t^9-3w^4+2t^9+4w^4
2t^9+2t^9-3w^4+4w^4
4t^9+w^4