Question

by foil method:

(7x+y) (2x-3y)

Answer 1

first = (7x)(2x) = 14x^2
outter = (7x)(-3y) = -21xy
inner = (y)(2x) = 2xy
last = (y)(-3y) = -3y^2

then add all:

14x^2 - 20xy - 3y^2

Answer 2

there is -19xy and not -21xy ATTENTION please !!! because -21xy+2xy=-19xy

Answer 3

hope that is understandably

Answer 4

\[F: 7x \times 2x = 14x^2\]
\[O: 7x \times -3y = -21xy\]
\[I: y \times 2x = 2xy\]
\[L: y \times -3xy^2\]

\[FOIL: 14x^2-19xy-3y^2\]