Express as a trinomial. (x-9)(3x-9)

Answer 1

(x-9)(3x-9)

Use FOIL.

Multiply First terms together,

then multiply the Outside terms,

then the Inside terms,

then the Last terms

sum them all

=x(3x) + (x)(-9) + (-9)(3x) + (-9)(-9)

= 3x^2 -9x -27x +81

= 3x^2 -36x +81