Please slove this for me

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf