Question

Gente me ajuda pfvvvvvvvvvvvvvvvvvvvv.....

Answer 1

$a) (a-2b)(a+2b)+3b^{2}$
$a^{2} - 4b^{2} + 3b^{2}$
$a^{2} - b^{2}$

$b) (a^{3} +2b)^{2} -( b^{4}-5a^{3} )( b^{4}+5a^{3} )$
$a^{6} +4a^{3}b+4b^2-(b^8-25a^6)$
$26a^6+4a^3b+4b^2-b^8$

$c)(2x-7y^2)(2x+7y^2 )-(x-2y)^2$
$4x^2-49y^4-(x^2-4xy+4y^2)$
$3x^{2} -49y^4+4xy-4y^2$

 $d)4a^{4} + 13a^{2}b^{2} + 9b^{4} - 20a^{3}b + 30ab^{3}$

$e)( a^{4} - 3a^{2}b^{5} - 8a^{2}b + 24b^{6} )^{2}$