Question

Which of the following is not a perfect square trinomial?



A.


144 + 12y + y2


B.


100 + 20y + y2


C.


64 – 16y + y2


D.


25 + 10y + y2

Answer 1

\(\large\color{midnightblue}{ \rm y^2+20y+100 =(y+10)^2 }\)
\(\large\color{midnightblue}{ \rm y^2-16y+64 =(y-8)^2 }\)
\(\large\color{midnightblue}{ \rm y^2+10y+25 =(y+5)^2 }\)

Answer 2

so A?