Question 188575
(5+4b)^2 is the same as (5+4b)*(5+4b)
:
so using FOIL to multiply this out
:
5(5)+5(4b)+4b(5)+4b(4b)=
:
{{{25+20b+20b+16b^2}}}
:
{{{16b^2+40b+25}}}