Question

Multiply.
(a) 3x+y (3x + 4y)

Answer 1

Answer:

9x2+ 12xy +3xy +4y2

9x2 +15xy +4y2

Answer 2

HEY MATE HERE IS YOUR ANSWER

$3x + y(3x + 4y)$

$= 3x(3x + 4y) + y(3x + 4y)$

$= (9 {x}^{2} + 12xy) + (3xy + 4 {y}^{2} )$

$= 9 {x}^{2} + 12xy + 3xy + 4 {y}^{2}$

$= 9 {x}^{2} + 15xy + 4 {y}^{2}$

HOPE THIS MAY HELP YOU