Question

Solve it please its urgent

Answer 1

Step-by-step explanation:

1.(5/7)^2×-1=(5/7)^-2×-5=(5/7)^10

2.(2/7)^2×(7/2)^-3÷ (7/5)^-2×-4

(2/7)^2×( 2/7)^3÷(7/5)^8

(2/7)^5÷(7/5)^8