(2-х)^2-x(x+3)=18 решите уравнение

2^x + 2^(x-3) = 182^x (1+2^(-3)) = 182^x (1+1/8) = 182^x * 9/8 = 182^x = 18*8/92^x = 162^x = 2^4x = 4

4-4х+х^2-х^2-3х=18-7х=18-4-7х=14х=-2