Mithcell Starc stars in Australia's 120-run win in 2nd Ashes Test
Resuming the day at 176/4, the tourists failed to provide any resistance as they kept losing wickets at regular intervals to completely lose the plot.
England could surrender the Ashes next week at the WACA ground in Perth, where it has not won a Test since 1978.
Delighted at the win, Australia skipper Steven Smith said: "We always had the faith in the team and the belief.
"We thought if we could come out and bowl well this morning, hit our lengths and get one or two wickets, then things can happen quickly," he added.
Root was understandably disappointed, but still positive as he looked ahead to a come-from-behind series win.
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