Question

1) 5(3 - 5a)2 – 5(3a - 7)(3a + 7) - 80a2 + 150a - 300;
2) 3(a - 1)2 + 5(a + 1)(a - 1) -8a2 + 6a;
3) (m - 1)2 – 4(m + 1)2 + 3m2 + 10m;
4) 5(1 - y)2 – (3+ y)2 – 4y2 + 16y.​

Answer 1

Объяснение:

решила......................