Question

2) c2 + (9- c)(9+c);​

Answer 1

с²+81-с²

с сокращаем

81

Answer 2

Ответ: с^2+81-с^2=81. Всё просто.

Объяснение:

Answer 3

To simplify the expression c^2 + (9 - c)(9 + c), we can use the distributive property of multiplication over addition.

First, let's expand the expression:

c^2 + (9 - c)(9 + c) = c^2 + (9 * 9) + (9 * c) + (-c * 9) + (-c * c)

Now, simplify the terms:

c^2 + 81 + 9c - 9c - c^2

Notice that the terms "c^2" and "-c^2" cancel each other out. Similarly, the terms "9c" and "-9c" also cancel each other out.

Therefore, the simplified expression is:

81