2^(2x)-5(2^x)=-4
Need help with the whole question, thanks!
if you let u=2^x, you have
u^2-5u+4 = 0
u = 1 or 4
2^x = 1 ==> x=0
2^x = 4 ==> x=2
Need help with the whole question, thanks!
u^2-5u+4 = 0
u = 1 or 4
2^x = 1 ==> x=0
2^x = 4 ==> x=2