Question

Срочно пжпжпжпж 20 балов

Answer 1

Ответ:

4,1a²+7,8ab-5,3b²-2,2a²-6,6ab+5,3b²=(4,1a²-2,2a²)+(7ab-6,6ab)-(5,3b²-5,3b²)=1,9a²+0,4ab=1,9×10²+0,4×10×6=1,9×100+4×6=190+24=214

Answer 2

4,1a^2 + 7,8ab - 5,3b^2 - 2,2a^2 - 6,6ab + 5,3b^2 = 1,9a^2 + 1,2ab = 1,9 * 100 + 1,2 * 60 = 190 + 72 =  262