Question

помогите пж с алгебпрй​

Answer 1

Ответ:

(30+1) ^2=(30) ^2+2*30*1+(1)^2=900+60+1=961

(30-1) ^2=(30) ^2-2*30*1+(1) ^2=900-60+1=841

(49) ^2=49*49=2401

(51) ^2=51*51=2601