How do you simplify $(4r ^ { 2} + 4r + 3) ( 3r ^ { 2} - 5r - 3)$ ?

Question

1125 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-10-06T03:37:35

$12r^2−8r^3−23r^2−27r−9$

$(4r^2)(3r^2)+(4r^2)(−5r)+(4r^2)(−3)+(4r)(3r^2)+(4r)(−5r)+(4r)(−3)+(3)(3r^2)+(3)(−5r)+(3)(−3)$
Then, simplify more!
into:
$12r^2−8r^3−23r^2−27r−9$

How do you simplify (4r ^ { 2} + 4r + 3) ( 3r ^ { 2} - 5r - 3)(4r ^ { 2} + 4r + 3) ( 3r ^ { 2} - 5r - 3)?