Question

How do you multiply `(x - 3)^2`?

Answer 1

`x^2-6x+9`

Explanation:

Write as `color(blue)((x-3))color(brown)((x-3))`

Multiply everything in the brown brackets by everything in the blue brackets.

Note that he minus sign of `color(blue)(-3)` follows the `color(blue)(3)`

`color(blue)(xcolor(brown)((x-3))" "-3color(brown)((x-3)))`

`x^2-3x" "-3x+9`

`x^2-6x+9`