Question

(– 8) + (– 4) (–8) – (– 4)​

Answer 1

Answer:

$(– 8) + (– 4) (–8) – (– 4) \\ \\ - 8 - 4 \times ( - 8) + 4 \\ \\ - 8 + 32 + 4 \\ \\ - 8 + 36 \\ \\ \\ 28$

HOPE THIS HELPS YOU!! :D

Answer 2

Answer:

(– 8) + (– 4) (–8) – (– 4)​

(– 8 – 4) (–8 + 4)​

by using the identity (a-b)(a+b) = a²-b²------------[a = (-8) and b = 4],

(– 8 – 4) (–8 + 4)​  = (-8)²-4²

(-8)²-4² = 64-16 = 48

Without using identity,

(– 8 – 4) (–8 + 4)​  = (-8)(-8)+(-8)(4)+(-4)(-8)+(-4)(4) = 64-32+32-16 = 48