Question 257096
Here is the problem:
{{{- (x+1)(x-2)}}}
step 1 - distribute the first x through the second parenthesis to get
x^2  - 2x
step 2 - distribute the (+1)  through the second parenthesis to get
x  - 2.
combine the like terms from these distributions to get
x^2 -x -2
change all of the signs because of the negative out front to get
-x^2 + x + 2