DOTS

Factor:
x² - 9

• ( x -9) (x - 9)
• (x + 3) (x + 3)
• (x + 3) (x - 3)
• ( x + 9) (x-9)

Tags

CCSS.HSA.APR.C.4

x² + 81

• not factorable

• ( x - 9 ) ( x + 9 )

• ( x + 9 ) ( x + 9 )

• ( x - 9 ) ( x - 9 )

Tags

CCSS.HSA.APR.C.4

16n² - 25

• (16n - 25)(16n + 25)
• (8n - 5)(8n + 5)
• (4n + 5)(4n - 5)
• Not Factorable

Tags

CCSS.HSA.APR.C.4

x² - 400

• ( x - 200) ( x + 200) 
• ( x + 20) ( x + 20) 
• Prime
• ( x - 20) ( x + 20) 

Tags

CCSS.HSA.APR.C.4

25x² - 36y²

• 5x + 6y(5x - 6y)

• (5x + 6y) (5x - 6y)

• (5x + 6y)²

• (5x - 6y)²

Tags

CCSS.HSA.APR.C.4

4x²y² - 1

• (2 + xy) (2 - xy)

• (2x + y) (2x - y)

• (2xy + 1) (2xy - 1)

• (2y + x) (2y - x)

Tags

CCSS.HSA.APR.C.4

64x² - 81y²

• (8x + 7y) (8x - 7y)

• (8x + 9y) (8x - 9y)

• (6x + 7y) (6x - 7y)

• (6x + 9y) (6x - 9y)

Tags

CCSS.HSA.APR.C.4

49x² - 144y²

• (7x + 16y) (7x - 16y)

• (7x + 12y)²

• (12x + 7y) (12x - 7y)

• (7x + 12y) (7x - 12y)

Tags

CCSS.HSA.APR.C.4

121x²y⁶z⁸ - 225w⁴

• (11xy⁴z⁴ + 15w) (11xy²z⁴ - 15w)

• (11x²y³z⁴ + 15w) (11x²y³z⁴ - 15w)

• (11xy³z⁴ + 15w²) (11xy³z⁴ - 15w²)

• (11xy³z + 15w²) (11xy³z³ - 15w²)

Tags

CCSS.HSA.APR.C.4

We can't factor using difference of two square this

49x² + 4y². Why?

• Because 4 is not a perfect cubed number.

• Because 4 is not a perfect squared number.

• Because 49 is not a perfect squared number.

• Because we can't factor using difference of two squares if it is addition sign.

Tags

CCSS.HSA.APR.C.4