Question

Выполните умножение: (10c+a)(10c-a); (c-4)(c+4);(3b^3+2)(3b^3-2);(k+14)(k-14);(8d+7n)(8d-7n)

Answer 1

(a -b)(a +b) =a² -b²
1. =10²c² -a² =100c² -a²

2. =c² -4² =c² -16

3. =3²(b^3)² -2² =9b^6 -4

4. =k² -14² =k² -196

5. =8²d² -7²n² =64d² -49n²