Question

Which value of x makes the numerical sentence true? 25^ 1/2 × 5 ^–3 = 5 ^x

Answer 1

5^-3=0.008
1/2=0.5
0.5*0.008=0.004
5/0.004=1250

Answer 2

25^1/2 × 5^–3 = 5 ^x
(5^2)1/2 × 5^–3 = 5^x
5^1 × 5^–3 = 5^x
5^-2 = 5^x
-2 = x
or 
x = -2

answer
x = -2 makes the numerical sentence true