How do you find a trinomial for the area of the rectangular rug that has sides of #x+7# feet and #5x-3#?

1 Answer
Sep 8, 2017

#5x^2 + 32x - 21#

Explanation:

If sides are # (x + 7 )# and #( 5x - 3 )# Then area is:

#( x + 7 )( 5x - 3 )#

Expanding brackets:

#5x^2 - 3x + 35x - 21#

Collecting like terms:

#color(blue)(5x^2 +32x - 21 )# This is the trinomial.