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in Algebraic Expressions by (56.4k points)

Simplify the algebraic expressions by removing grouping symbols.

20 – [5xy + 3[x2 – (xy – y) – (x – y)]]

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Best answer

Given 20 – [5xy + 3[x2 – (xy – y) – (x – y)]]

First we have to remove the parentheses, then remove braces, and then the square brackets.

Then we get,

= 20 – [5xy + 3[x2 – (xy – y) – (x – y)]]

= 20 – [5xy + 3[x2 – xy + y – x + y]]

= 20 – [5xy + 3[x2 – xy + 2y – x]]

= 20 – [5xy + 3x2 – 3xy + 6y – 3x]

= 20 – [2xy + 3x2 + 6y – 3x]

On simplifying we get

= 20 – 2xy – 3x2 – 6y + 3x

= – 3x– 2xy – 6y + 3x + 20

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