Can anyone answer this Factor f(x)=x2−8x+16

(A) (x−4)2
(B) (x+8)2
(C) (x−8)2
(D) (x+4)2

Which trinomial is a perfect square trinomial?

(A) y2+6y+36
(B) y2+25y+200
(C) y2+18y+81
(D) y2+36y+60

Factor 4x2+36x+81

(A) (2x+9)(2x−9)
(B) (4x+9)2
(C) (2x−9)2
(D) (2x+9)2

Which expression is a factor of 16x2−81?

(A) 4x−9
(B) 8x−9
(C) 4x−81
(D) 8x−81

Factor f(x)=x2−6x+9

(A) (x−9)2
(B) (x−3)2
(C) (x+9)2
(D) (x+3)2