Unit 2 G2 - Identifying Perfect Squares

Which is these equations is a quadratic function?

• f(x)=2x+5
• f(x)=2^x
• f(x)=(x+1)³
• f(x)=(x-5)²

Is this a perfect square trinomial?
x² + 16x + 64

• Yes
• No

Is this a perfect square trinomial?
x² + 14x + 49

• Yes
• No

Factor: x² + 24x + 144

• (x + 12)²
• (x + 9)²
• (x + 15)²
• (x + 13)²

Factor: x² - 4x + 4

• (x + 2)²
• (x - 2)²
• (x + 4)²
• (x - 4)²

Factor:
 n² + 10n + 25

• (n + 5)(n - 5)
• (n + 25)(n + 1)
• (n - 5)²
• (n + 5)²

Factor 

x² + 18x + 81                      

• (x + 9)(x – 9)
• (x + 18)²
• (x + 9)²
• (x + 6)²

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

• Yes
• No

Put into standard form: (x + 6)²

• x² + 6x + 12
• x² + 6x + 36
• x² + 12x + 6
• x² + 12x + 36

√ 81

• 8
• 7
• 10
• 9