Question

At which root does the graph f(x)= (x+4)^6(x+7)^5 cross the x axis

Answer 1

If you're from Edg it would be answer

A: -7

Answer 2

It crosses or touches the x-axis when y=0, so any value of x which makes this true would be a "root".  In this case x=-4 or -7 would be points where f(x) touches the x-axis.