Question

.. 1) 7(2a + 1)2 – (3a - 2)(6 - 2a) - 3a”;
2) – (3a – 1)2 – (4 - 5a)(7 – 2a) – 5a”;
3) (2a – 5)2 + (1 - 3a)(3 – 2a) – 7a;
4) 2(2a - 3)2 – 3(3a + 7)(4 - a) + 9a? +​

Answer 1

Ответ:

1.6a2+3a+26

2.-10a2+32a-6

3.6a2-14a-7

4.9a2+2a-96