а) 2(a+b) = 2(-5) = -10б) -(a+b) = -(-5) = 5в) 3a+3b = 3(-5) + 35 = -15 + 15 = 0г) -4a-4b+10 = -4(-5) - 4*5 + 10 = 20 - 20 + 10 = 10
а) 2(a+b) = 2(-5) = -10
б) -(a+b) = -(-5) = 5
в) 3a+3b = 3(-5) + 35 = -15 + 15 = 0
г) -4a-4b+10 = -4(-5) - 4*5 + 10 = 20 - 20 + 10 = 10