Question

B2-49= A (b-7)(b-7) Б b2-14b+49 B (b-7)(b+7) Г (b-9)(b+9)

Answer 1

b²-49=(b-7)(b+7)

это формула сокращенного умножения. ответ В. хорошего дня:)

Answer 2

It seems like you've provided a quadratic equation and several options for factoring it. Let's factor the given quadratic equation B2-49 and see which option matches the correct factorization.

The given quadratic equation is:

B^2 - 49

This is a difference of squares because 49 is a perfect square, which is 7^2. So, you can factor it as follows:

B^2 - 49 = (B - 7)(B + 7)

So, the correct factorization of B^2 - 49 is:

(B - 7)(B + 7)

Option B is the correct factorization.