Question

4) (3 - c)(3 + c);6) (a - 7)(a + 7);8) (a - b) 2 + 3)2​

Answer 1

Ответ:

4)3²-с²=9-с²

6)а²-7²=а²-49

8)(а-b)×5=5a-5b

буду рад если отметишь как лучший ответ

Answer 2

Sure, I can help you simplify these expressions:

4. (3 - c)(3 + c): Using the difference of squares formula, (a - b)(a + b) = a^2 - b^2, we can simplify this expression as follows: (3 - c)(3 + c) = 3^2 - c^2 = 9 - c^2

5. (a - 7)(a + 7): This expression is also a difference of squares: (a - 7)(a + 7) = a^2 - 7^2 = a^2 - 49

6. (a - b)^2 + (a + b)^2: To simplify this expression, expand the square terms: (a - b)^2 = a^2 - 2ab + b^2 (a + b)^2 = a^2 + 2ab + b^2

   Now, add these two simplified expressions together: (a - b)^2 + (a + b)^2 = (a^2 - 2ab + b^2) + (a^2 + 2ab + b^2)

   Combine like terms: a^2 - 2ab + b^2 + a^2 + 2ab + b^2 = 2a^2 + 2b^2

So, the simplified expression is 2a^2 + 2b^2.