Matemática, perguntado por Candykpoper, 1 ano atrás

m^{2}+6mn+n^{2} para m= 2/3 e n= -1/2

Soluções para a tarefa

Respondido por andreluizdeoliveira
0
Se m= \frac{2}{3} n=- \frac{1}{2}

Então,

m^2+6mn+n^2 =( \frac{2}{3} )^2+6. \frac{2}{3}.(- \frac{1}{2} )+(- \frac{1}{2} )^2

( \frac{2}{3} )^2+6. \frac{2}{3}.(- \frac{1}{2} )+(- \frac{1}{2} )^2=

( \frac{2^2}{3^2} )+6. \frac{2}{3}.(- \frac{1}{2} )+(- \frac{1^2}{2^2} )=

( \frac{4}{9} )+6. \frac{2}{3}.(- \frac{1}{2} )+(- \frac{1}{4} )=

\frac{4}{9} +\frac{12}{3}.(- \frac{1}{2} )+(- \frac{1}{4} )=

\frac{4}{9} +4.(- \frac{1}{2} )+(- \frac{1}{4} )=

\frac{4}{9} +(- \frac{4}{2} )+(- \frac{1}{4} )=

\frac{4}{9} +(-2 )+(- \frac{1}{4} )=

\frac{4}{9} -2 +(- \frac{1}{4} )=

\frac{4-18}{9}- \frac{1}{4}=

-\frac{14}{9}- \frac{1}{4}=

\frac{-56-9}{36}=\boxed{- \frac{65}{36}}
Perguntas interessantes