Question

aratati ca

(20²+2·20·21+21²):(20+$\frac{1}{2}$ ) =82

Answer 1

Răspuns:

Explicație pas cu pas:

(20 +21)^2 : (41/2) = 41^2 * 2/41 = 41*2 = 82

Answer 2

(20²+2×20×21+21²):(20+1/2)=

=(400+840+441):(40/2+1/2)=

=1681:41/2=

=1681×2/41=

=41×2=82