Question

2^(x+2) + 2^x = 320 .. what is the answer for x?

Answer 1

\[2^{x+2}=2^22^x=4\cdot2^x\]

Answer 2

2^(x+2) + 2^x = 320
2^2 * 2^x + 2^x = 320
4 * 2^x + 2^x = 320
5 * 2^x = 320
divide by 5 to both sides, giving us
2^x = 64
2^x = 2^6

so, x = .....

Answer 3

whats your answer raden.. and i don't think thats the ritght way of doing it

Answer 4

@RadEn didn't give you the answer, but it should be clear what it is. All his work his right.

Answer 5

in the last step, cancel the base 2 from both sides, take the rest as ur answr

Answer 6

ohh okay makes sense.. x is 6!

Answer 7

haha, good finishing :)

Answer 8

thank you so much :)! i have another question could i just ask it here?

Answer 9

log(base 2) (3x+2) + log(base2) (x-1) = 3