Factoring Perfect Square Trinomials (What's In)

Which of the following is a perfect square?

• x

• x²

• x³

Answer explanation

$x^2\ =\ x\cdot x\ or\ \sqrt{x^2}=x$

Which of the following is a perfect square?

• 2

• 4

• 6

Answer explanation

 $4\ =\ 2\cdot2\ or\ \sqrt{4}=2$  

Which of the following is a perfect square?

• 9x²y²

• 12x²y

• 15x²y²

Answer explanation

$9x^2y^2\ =\ 3xy\cdot3xy\ or\ \sqrt{9x^2y^2}=3xy$

Which of the following is a perfect square?

• 121

• 145

• 125

Answer explanation

$121\ =\ 11\cdot11\ or\ \sqrt{121}=11$

Which of the following is a perfect square?

• abc

• $a^2b^4c^6$
  

• $a^3b^6c^9$

Answer explanation

$a^2b^4c^6\ =\ ab^2c^3\cdot ab^2c^3\ or\ \sqrt{a^2b^4c^6\ }=ab^2c^3$

Determine the positive square root of

 $\sqrt{25}$  

(a)  

Answer explanation

 $5\cdot5=25$  

Determine the positive square root of

 $\sqrt{81}$  

(a)  

Answer explanation

 $9\cdot9\ =\ 81$  

Determine the positive square root of

 $\sqrt{64}$  

(a)  

Answer explanation

 $8\cdot8\ =\ 64$  

Determine the positive square root of

 $\sqrt{100}$  

(a)  

Answer explanation

 $10\cdot10=\ 100$  

Determine the positive square root of

 $\sqrt{169}$  

(a)  

Answer explanation

 $13\cdot13=\ 169$