Question

(1/5) ELEVADO A x2-8=625

Answer 1

(1/5)^x²-8= 625

(5-¹)^x²-8= 5⁴

5 ^-x²+8= 5⁴

-x²+8=4

-x²=4-8

-x²= -4(×-1)

x²= 4

x=±√4

x=±2

S={±2}