Question

4 elevado a x + 4 sobre 2 elevado a x= 5

Answer 1

4^(x+4) ÷ 2^x= 5
2^(x+4)*2^(x+4) ÷ 2^x= 5
2^(2x+8) ÷ 2^x= 5
2^(x+8)= 5

x+8= log5/log2
x+8=2,3214
x=-5,67807