Question

(A-B)×(A+B),quando a =1 e b=3/4

Answer 1

Resposta:

(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

Explicação passo-a-passo: