Question

simplifique a expressão algebrica a+b/ b-¹ a-¹

Answer 1

$\frac{a+b}{ b^{-1}a ^{-1} }= \frac{a+b}{ \frac{1}{b}. \frac{1}{a} }= \frac{a+b}{ \frac{1}{ab} }=$

$(a+b): \frac{1}{ab}=(a+b).ab=a^2+2ab+b^2=(a+b)^2$