Given 10x=310^x = 310x=3 and 10y=410^y = 410y=4, express log10(1.2)\log_{10}(1.2)log10(1.2) in terms of xxx and yyy.
x+y−1x + y - 1x+y−1
x−y+1x - y + 1x−y+1
y−x+1y - x + 1y−x+1
1−x−y1 - x - y1−x−y