Question

Довести тотожнисть 1) 2b(-4)+8b-4=-4 2)a-(4a-3в)=3(в-а)

Answer 1

1). 2b(-4) + 8b - 4 = -4

   -8b + 8b - 4 = -4

   -4 = -4

2). a - (4a - 3b) = 3(b - a)

    a - 4a + 3b = 3(b - a)

    -3a + 3b = 3(b - a)

    3(b - a) = 3(b - a)

   

Answer 2

2b(-4) + 8b - 4 = -4

-8b + 8b - 4 = 4b = 0

a - (4a - 3b) = 3(b - a)

a - 4a + 3b = 3b - 3a

-3a + 3b = -3a + 3b

The identities hold true.

Therefore,

1. 2b(-4) + 8b - 4 = -4 simplifies to 4b = 0

2. a - (4a - 3b) = 3(b - a) simplifies to -3a + 3b = -3a + 3b