a daw: 4*2^3x+3 − 2^2x+2−4*2^x+1+1=0 4*2^3x * 2³−2^2x*2²−4*2^x*2+1=0 32*2^3x−4*2^2x−8*2^x+1=0 2^x=t 32t³−4t²−8t+1=0 8t(4t² −1)−(4t²−1) (8t−1)(4t²−1) t=1/8 4t²−1=0 t=1/2 t=−1/2 2^x=1/8 x=−3 2^x=1/2 2^x≠−1/2 x=−1