Question

60
50. Solution of the eqution 5^2x – 5^x+3 +125=5* ?
(a)x=0,3 (b)x= 1,3 (c)x=0,4 (d) x = 2, 3​

Answer 1

Answer:

a.0,3

Step-by-step explanation:

Let 5^x=k

k^2-k.5^3+125=k

k^2-126k+125=0

solve

k=125 or k=1

5^x=125 or 5^x=1

5^x=5^3 or 5^x=5^0

x=3, x=0