Perfect Squares and Difference of Squares Trinomials

Which of the following trinomials is a perfect square trinomial?

• r² - 6r + 36

• 4y² + 10y + 25

• x² + 16x + 16

• 9a² - 12a + 4

Factor, if possible: 
64x²-16x+1

• Not factorable.

• (32x-1)²

• (8x+1)²

• (8x-1)²

Factor: x² + 24x + 144

• (x + 12)²

• (x + 9)²

• (x + 15)²

• (x + 13)²

x² + 18x + 81

• (x + 9)(x – 9)

• (x + 18)²

• (x + 9)²

• (x + 6)²

Factor completely.

x² - 144

• ( x - 12 ) ²

• ( x - 12 ) ( x - 12 )

• ( x + 12 ) ( x + 12 )

• ( x + 12 ) ( x - 12 )

x² - 25

• ( x + 5 ) ( x - 5 ) 

• ( x - 5 ) ( x - 5 ) 

• ( x + 5 ) ( x + 5 ) 

• Prime

• A
• B
• C
• D

Is this a perfect square trinomial?
x² + 6x + 9

• Yes

• No

Is this a perfect square trinomial?
x² + 18x + 9

• Yes

• No

Is this a perfect square trinomial?
x² + 10x + 100

• Yes

• No