Question

resolva a equação 52x-1 -10.5x-1 - 75=0

Answer 1

Ola 

5^(2x - 1) - 10*5^(x - 1) - 75 = 0

5^2x/5 - 10*5^x/5 - 75 = 0

5^2x/5 - 2*5^x - 75 = 0

5^2x - 10*5^x - 375 = 0

y^2 - 10y - 375 = 0

delta
d^2 = 100 + 1500 = 1600
d = 40

y1 = (10 + 40)/2 = 25

25 = 5^x ,  x = 2