Question

faça passo a passo esse: 1881 ^{2} - 1999^{2} tipo esse $(a^{2}-b^{2} =(a-b) (a+b)$

Answer 1

$a^2-b~2=(a-b)(a+b)$

$1.881^2-1.999^2=(1.881+1.999)(1.881-1.999)=3.880\cdot(-118)=-457.840$.