4^(9+x)=16
2^2(9+x)=2^4
2^(18+2x)=2^4
18+2x=4
14+2x=0
x=-14/2
x=-7
х = 16 - 4^9
x = 4^2 - (2^9)^2 = (4 - 2^9)(4 + 2^9)
2^9 = 2^5 * 2^4 = 32*16 = 512
x = (4-512)(4+512) = -508*516 = -(500+8)(500+16) = -(500*500 + 500*(8+16) + 8*16) =
= -(250 000 + 500*24 + 128) = -(250 000 + 12 000 + 128) = -262128