Question

1)25а2-49в22)(7с-5а)23)(4а+9с)24)(а-7с)35)(5а-2в)3​

Answer 1

Объяснение:

решение и формулы смотри на фотографиях

Answer 2

Ответ:

$25a ^ { 2 } -49b ^ { 2 } =(5a-7b)(5a+7b)\\ (7c-5a) ^ { 2 } =49c^2-70ca+25a^2\\ (4a+9c) ^ { 2 } =16a^2+72ac+81c^2\\ (a-7c) ^ { 3 } =a^3-21a^2c+147ac^2-343c^3\\ (5a-2b) ^ { 3 } =125a^3-150a^2b+60ab^2-8b^3$

Объяснение:

Answer 3

I see that you have provided a mathematical expression consisting of several terms. However, the expression seems to be incomplete or has some formatting issues. Could you please clarify or correct the expression so that I can help you with the calculations?