1) 3a + 2b
2) 2(a + b - 4m)
Объяснение:
a + b + (a-b) + b + b + a = a + b + a -b + b + b + a = 3a + 2b
a - 2m + b - 2m + a - 2m + b - 2m = 2a + 2b - 8m = 2(a + b - 4m)
:)
В решении.
Объяснение:
1) BH = a + b;
AB = a - b + b = a;
AD = a;
HL = a - b;
ML = b;
MD = b;
P = a + b + a + a + a - b + b + b = 4a + 2b = 2(2a + b);
2) Р = 8*m + 2(b - 2m) + 2(a - 2m) =
= 8m + 2b - 4m + 2a - 4m =
= 2a + 2b = 2(a + b).
