Verified answer

Ответ:

Объяснение:

(4m²+2mn-n²)/8m²+3n²=

=n²(4m/n)² +2mn/n² –n²)/  n²(8(m/n)²+3)=

=(4*(1/2)²+2*1/2-1) / (8*(1/2)²+3)=

=4*1/4+2-1) / 8*(1/2)²+3=

=(1+1-1)/(2+3)=1/5 = 0,2

OTBET: (2)