Question

( 2 1/3a+1 1/2b)^2
(1 2/3m-1 2/5n)^2

Answer 1

1) $(frac{2}{3a} + frac{1}{2b}) ^{2}$
($(frac{4b+3a}{6ab} ) ^{2}$
$frac{(4b+3a) ^{2} }{36a ^{2}b ^{2} }$
Ответ:
$frac{16b^2+24ab+9a^2}{36a^2b^2}$

2) $( frac{2}{3m} - frac{2}{5n} )^2$
$(frac{10n-6n}{15mn} )^2$
$frac{(10n-6m)^2}{225m^2n^2}$
Ответ:
$frac{100n^2-120mn+36m^2}{225m^2n^2}$