Answer:

1. 25x^6

2. x^2 - 1

Step-by-step explanation:

1. (5x)^2(x^2)^2 (-10x)^0

(25x^2)(x^4)(1)

25x^6

note: when getting the exponent of an exponent multiply

when multiplying exponent, add it

2. multiply both x = x^2

multiply (-1) and (1) so -1

then, x^2 - 1