Question

31.3.
2)64-b^2
4)2,89-d^2
6)100/121-у^2
8)t^2-400/441
10)-16+49y^2
12)64/81t^2-36
14)25/64b^2-81/1​

Answer 1

Пошаговое объяснение:

2) (8-b)(8+b)

4) (1,7-d)(1,7+d)

6)(10/11-y)(10/11+y)

8) (t - 20/21)(t+20/21)

10)-(16-49y^2)= -(4-7y)(4+7y)

12) (8/9t-6)(8/9t+6)

14)(5/8b-9/1)(5/8b+9/1)