Question

(2x^3-x+3)-(3x^3+x^2-x)

Answer 1

-x^3 -x^2 +3

Answer 2

how did you get that answer?

Answer 3

you solve it by grouping the like terms. You can't say subtract x^3 and x^2, because they are two different numbers. so then you get the answer him1618 wrote.

Answer 4

you just change the signal of everything inside the parenthesis cause it has a - before it, then sum the equals terms

Answer 5

-x^3-x^2+3

Answer 6

\[\left[\begin{array}c 2x^3&+0x^2&-x&+3\\-3x^3&-x^2&+x&+0\\--&--&--&--\\-x^3&-x^2&0x&3\end{array}\right]\]
\[-x^3 -x^2 +3\]

Answer 7

Thank you amistre64 for that explanation I understand!