9). [-(x²-y²)+2x²-3y²-(x²-2x²-3y²)]
10). -[-(a-2b)-(a+2b)-(-a-3b)]
11). 3x+2y-{2x-[3x-(2y-3x)-2x]-y}
10). -[-(a-2b)-(a+2b)-(-a-3b)]
11). 3x+2y-{2x-[3x-(2y-3x)-2x]-y}
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Respuesta:
9).
[-(x²-y²)+2x²-3y²-(x²-2x²-3y²)]
[tex][-x^2 + y^2 + 2x^2 - 3y^2 - x^2 + 2x^2 + 3y^2]\\\\y^2 + 2x^2[/tex]
10).
-[-(a-2b)-(a+2b)-(-a-3b)]
[tex]-[-a + 2b - a - 2b + a + 3b]\\\\-[-a+3b]\\\\a - 3b[/tex]
11).
3x+2y-{2x-[3x-(2y-3x)-2x]-y}
[tex]3x + 2y -[2x - [3x - 2y + 3x - 2x] - y]\\\\3x + 2y -[2x - [4x - 2y] - y]\\\\3x + 2y - [2x - 4x + 2y - y]\\\\3x + 2y -[-2x + y]\\\\3x + 2y + 2x - y\\\\5x + y[/tex]
Explicación paso a paso: