Simplify: (x^2+2x-1)-(x+1)

x^2+x-2

this is the answer bc the 2nd parentheses is being multiplied by the negative  sign meaning you need to subtract it from the 1st parentheses.

x² + x - 2

Step-by-step explanation:

Simplify the following:

(x² + 2x - 1) - (x + 1)

-(x + 1) = -x - 1:

x² + 2x - 1 - x - 1

Grouping like terms,

x² + 2x - 1 - x - 1 = x² + (2x - x) + (-1 - 1):

x² + (2x - x) + (-1 - 1)

2x - x = x:

x² + x + (-1 - 1)

-1 - 1 = -2:

x² + x - 2

i dont get it. where are the "descriptions"?

associative property of multiplication