Question

need help
the parabolas =-10x^2+10x-6 and y=-5x^2-1 intersect at
A.they do not intersect
B.x=1 and x=3
C.x=1
D.x=1 and x=-1

Answer 1

@hartnn

Answer 2

Equate the two parabolas to find the point(s) of intersection.
If the solution is complex, there is no intersection. If you found solutions, that's where they intersect.

Lazy way:
substitute the given values (of B, C or D) and see if the parabolas give the same values.