Question

Urgentee 

 

qual o valor numerico da seguinte expressão:

 

a) b² +2.(a+b) + a², para  a= 3 e b= 1/2

Answer 1

$<var>b^2+2(a+b)a^2\\\\(\frac{1}{2})^2+2(3+\frac{1}{2})+3^2\\\\\frac{1}{4}+2(\frac{6+1}{2})+9\\\\\frac{1}{4}+2*\frac{7}{2}+9\\\\\frac{1}{4}+\frac{14}{2}+9\ MMC\ de\ 2,4\ e\ 1=4\\\\\frac{1+28+36}{4}=\\\\\frac{65}{4}</var>$

Answer 2

$<var>(\frac{1}{2})^2+2\cdot(3+\frac{1}{2})+3^2=\frac{1}{4}+2\cdot\frac{7}{2}+9=\frac{1}{4}+7+9=\frac{1}{4}+16=\frac{65}{4}</var>$