Algebra-1

To expand the expression (x - 1)(x + y + 2), we can use the distributive property and multiply each term of the first expression by each term of the second expression:

(x - 1)(x + y + 2) = x * (x + y + 2) + (-1) * (x + y + 2)

Expanding further:

= x² + xy + 2x - x - y - 2

Combining like terms:

= x

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