Question

Determine o valor da expressão algébrica ( a+b) . ( a +b) quando a= 1 e b= 3/4

Answer 1

( a+b) . ( a +b) => ( a+b)² => a²+2ab+b²         

 a=1   b=3/4 
 a²+2ab+b²   => 1²+2*1*(3/4)+(3/4)²  =>1+(6/4)+(9/16) => 1+ (24+9/16) =>
1+(33/16) => 1+2,0625 => 3,0625