(5x^4+6x^3-9x^2)-(-6x^4-6x^3+8x)
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(5x^4+6x^3-9x^2)-(-6x^4-6x^3+8x)
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Answer:
x4 +9x^2 -8x
Explanation:
Subtract the like term, and write down the unlike term.
5x^4 - 6x^4 are like term, subtract it and will be -x^4
6x^3 - 6x^3 are like term, subtract it and will be 0, so you don't need to write down.
-9x^2 and + 8x are unlike terms, so you just need to write down with the answer, and the answer is -x^4 -9x^2 +8x
but the -x^4 was negative, divide it by -1 to make it positive, so the answer was:
x^4 +9x^2 -8x
Does this help? ^^
Hope it helps ;)