Question

What is the sum of -2x³ + x-3 and x³ - 3x - 4?

(a) Show your work.
(b) Is the sum of -2x³ + x-3 and x³ - 3x - 4 equal to the sum of x³ - 3x - 4 and
-2x³ + x-3? Explain your answer.

Answer 1

You have to simplify them

Answer 2

Step-by-step explanation

For the first sum you nee to find the same coefficient or add or subtract a number

`-x^3 -2x -7`

This the simplified version of the sum above. I have basically subtracted -2x^3 by x^3 to make -x^3. Then I have subtracted -3x and x to make -2x. Finally I have added -4 and -3 as the rule suggests to add two numerals the minus symbol on both of them.

The next sum we have to simplify both numerals so we know if both sum’s answer are

`-x^3 -2x -7-x^3 -2x -7`

After simplifying them, both of them have the same answer, so the statement is true. To explain this, we could say that the sums were basically rotated around to trick us but the answer is still the same