Question

(7k-1) (1+7k) -k (4-3k) СРОЧНО!!!!!!

Answer 1

Ответ:Ответ на фото

Объяснение:

Answer 2

Ответ:

49k²-1-4k+3k²=46k²-1-4k

Объяснение:

(a+b)(a-b)=a²-b²

Answer 3

To simplify the expression (7k-1)(1+7k) - k(4-3k), you can expand and then combine like terms:

(7k - 1)(1 + 7k) - k(4 - 3k)

First, expand the products:

= (7k)(1) + (7k)(7k) - 1(1) - 1(7k) - (k)(4) - (k)(-3k)

Now, simplify each term:

= 7k + 49k^2 - 1 - 7k - 4k + 3k^2

Combine like terms:

= (49k^2 + 3k^2) + (7k - 7k - 4k) - 1

= 52k^2 - 4k - 1

So, the simplified expression is 52k^2 - 4k - 1.