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Answer:
10x^3+9x^2-9
Step-by-step explanation:
8x^3+2x-2+9x^2-7+2x-2x^3 - Combine like terms
10x^3+9x^2-9
Answer:
[tex]\boxed{\boxed{\sf 6x^3+9x^2+6x-9}}[/tex]
Step-by-step explanation:
[tex]\sf \left(8x^3+3x-2\right)+\left(9x^2-7+3x-2x^3\right)[/tex]
[tex]\sf 8x^3+3x-2+9x^2-7+3x-2x^3[/tex]
Note: If there is a negative sign in front of parentheses, each term within the expression changes sign.
[tex]\Longrightarrow \sf 8x^3+3x-2+9x^2-7+3x-2x^3[/tex]
Now, we need to organize expression into groups like terms:
[tex]\Longrightarrow \sf (8x^3, -2x^3)\: (3x, 3x)\:(-2,-7)[/tex]
[tex]\longmapsto\sf 8x^3-2x^3=6x^3[/tex]
[tex]\longmapsto\sf 3x+3x=6x[/tex]
[tex]\longmapsto\sf -2-7=-9[/tex]
[tex]\boxed{\sf 6x^3+9x^2+6x-9}[/tex]
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