Verify experimentally that base angle of an isosceles triangle are equal​

The factorization of 8x3 -125 is (2x-5)(jx2 +kx+25)

Atriangle has verticals at b(-3,0), c(2,-1), d(-1,2). which transformation would produce an image with verticals b”(-2,1), c”(3,2), d”(0,-1)?

50 points~ ! i have to turn this in tomarrow