(2a - 8b + 3) * (-2) - 5(-a+1,8b - 1,4) при a = -5; b = 1

Question

(2a - 8b + 3) * (-2) - 5(-a+1,8b - 1,4) при a = -5; b = 1

Answer 1

1) (2a-8b+3)*(-2)= -4a+16b-6
2) -4a+16b-6-5(-a+1,8b-1,4)= -4a+16b-6+5a-9b+7=a+7b+1
при а=-5 , b=1
-5+7*1+1= 3