Question

me ajudaaaaa e pra hj de tarde​

Answer 1

Resposta:

$b)\\ \\ mn^{2} -4mn^{2} \\ \\ para\\\\ m=\frac{1}{2} \\ \\ n=-\frac{1}{2} \\ \\ \frac{1}{2}.(-\frac{1}{2} )^{2} -4(\frac{1}{2})(-\frac{1}{2} )^{2} =\\ \\ \\ \frac{1}{2} .\frac{1}{4} -\frac{4}{2} .\frac{1}{4} =\\ \\ \frac{1}{8} -\frac{4}{8} =\\ \\ \frac{1-4}{8} =\\ \\ -\frac{3}{8}$