∵2x-5y-4=0
∴5y-2x=-4
4的x次方除32的y次方
=(2^5)^y÷(2²)^x
=2^5y÷2^2x
=2^(5y-2x)
=2^(-4)
=1/2^4
=1/16到底答案对不对是除就是上面答案。如果是除以原式=2^(2x-5y)=2^4=16