(3а+7b)-(4а+3b) при а=-0,2, b=-0,8

Question

(3а+7b)-(4а+3b) при а=-0,2, b=-0,8

Answer 1

(3a+7b)-(4a+3b) при а= -0,2, b=0.8

3a+7b-4a-3b=-a+4b=-(-0.2)+4*0.8=0.2+3.2=3.4