Question

Math help ( please make the explanation as simple as possible)

Answer 1

The graph has only one root because touches the x-axis on only one point then the function has one root

we look the fuction of a parabola like

`(x+a)(x+b)`

where -a and -b are the roots of the function

on our case we have one root on x=1 then the value of the two number a and b must be the same

then the fuction is

`(x-1)(x-1)`

and right option is D