log_(x-2)_(2x^2-11x+16)=2log_(x-2)_(x-2)
log_(x-2)_(2x^2-11x+16)=log_(x-2)_(x-2)^2
2x^2-11x+16=(x-2)^2
2x^2-11x+16=x^2-4x+4
2x^2-11x+16-x^2+4x-4=0
x^2-7x+12=0
D=49-4*12=49-48=1
x1=7-1\2=6\2=3
x2=7+1\2=8\2=4
x1+x2=3+4=7
log_(x-2)_(2x^2-11x+16)=2log_(x-2)_(x-2)
log_(x-2)_(2x^2-11x+16)=log_(x-2)_(x-2)^2
2x^2-11x+16=(x-2)^2
2x^2-11x+16=x^2-4x+4
2x^2-11x+16-x^2+4x-4=0
x^2-7x+12=0
D=49-4*12=49-48=1
x1=7-1\2=6\2=3
x2=7+1\2=8\2=4
x1+x2=3+4=7