Question

Simplifique as expressões abaixo
A)(3y+1)2 - (y+9)2

Answer 1

$6y+2-2y-18y$
$-14y+2$

Answer 2

[(3y + 1) + (y + 9)][(3y + 1) - (y + 9)]
[ 4y + 10][2y - 8]
2(2y + 5)2(y - 4)
4(2y + 5)(y - 4)