Question

求解一道指数方程4^x+2+2×6^x=8×9^x 求x.请写出简要的步骤能看懂即可,16*m^2+2mn-8*n^2=

Answer 1

设m=2^x,n=3^x

2=8*n^2-2mn-m^2

2=(4n+m)(2n-m)