Question

Multiply: (x + 1)(x - 2).

Answer 1

\[(x+1)(x-2)\]
\[x(x-2)+1(x-2)\]
\[x(x)-x(2)+1(x)-1(2)\]
\[x^2-2x+x-2\]
\[x^2-x-2\]

Answer 2

x^2 -2x+x-2 =x^2 -x-2

Answer 3

=x^2-x-2