Question

ajuda gente por favor ​

Answer 1

Resposta:

Elimine os parênteses;

- Agrupe os termos semelhantes e faça a soma.

\begin{gathered}A)~~ (3x^3+5x^2+x-3)+(x^3-3x^2+2x+4)\to \\\\ 3x^3+5x^2+x-3+x^3-3x^2+2x+4\to \\\\ 3x^3+x^3+5x^2-3x^2+x+2x-3+4\to \\\\ \boxed{4x^3+2x^2+3x+1}\end{gathered}A)  (3x3+5x2+x−3)+(x3−3x2+2x+4)→3x3+5x2+x−3+x3−3x2+2x+4→3x3+x3+5x2−3x2+x+2x−3+4→4x3+2x2+3x+1

\begin{gathered}B)~~(4x^3-4x^2+2x+1)-(2x^3-3x^2+x+2)\to \\\\ 4x^3-4x^2+2x+1-2x^3+3x^2-x-2\to \\\\ 4x^3-2x^3 -4x^2+3x^2+2x-x+1-2\to \\\\ \boxed{2x^3-x^2+x-1}\end{gathered}B)  (4x3−4x2+2x+1)−(2x3−3x2+x+2)→4x3−4x2+2x+1−2x3+3x2−x−2→4x3−2x3−4x2+3x2+2x−x+1−2→2x3−x2+x−1

\begin{gathered}C)~~(-x^2+2xy+y^2-2)+(x^2-2xy+y^2+2)\to \\\\-\not x^2+\not2xy+y^2-\not2+\not x^2-\not2xy+y^2+\not2\to \\\\ y^2+y^2\to \\\\ \boxed{2y^2}\end{gathered}C)  (−x2+2xy+y2−2)+(x2−2xy+y2+2)→−x2+2xy+y2−2+x2−2xy+y2+2→y2+y2→2y2

\begin{gathered}D)~~(-x^2-2xy-y^2-1)-(-x^2-2xy+y^2+1)\to \\\\ -x^2-2xy-y^2-1+x^2+2xy-y^2-1\to \\\\ -\not x^2+\not x^2-\not 2xy+\not 2xy-y^2-y^2-1-1\to \\\\ \boxed{-2y^2-2}\end{gathered}D)  (−x2−2xy−y2−1)−(−x2−2xy+y2+1)→−x2−2xy−y2−1+x2+2xy−y2−1→−x2+x2−2xy+2xy−y2−y2−1−1→−2y2−2