Let f(x)=2x^2 and g(x)=x^-2 find f(g(x))

Can someone me with my hwplz(only the circled ones)

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is