3-3 Factoring 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

Factor the Following completely

4x²-16

• (2x-4)(2x+4)

• (4x-4)(4x+4)

• 4(x-2)²

• 4(x-2)(x+2)

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

Factor a² - 225

• (a - 15)(a - 15)

• (a + 15)(a - 15)

• (a + 15)(a + 15)

• (a - 15)²

Tags

CCSS.HSA.APR.C.4

Factor 49d² - 1

• (7d - 1)(7d - 1)

• (7d + 1)²

• (d - 7)(d + 7)

• (7d + 1)(7d - 1)

Tags

CCSS.HSA.APR.C.4

Factor 4c² - 9

• (2c - 3)(2c - 3)

• (2c + 3)(2c - 3)

• (2c + 3)(2c + 3)

• Not factorable

Tags

CCSS.HSA.APR.C.4

Factor 81m² - 1 (DOTS)

• not factorable
• (m - 9)(m + 9)
• 9m(9m - 1)
• (9m - 1)(9m + 1)

Tags

CCSS.HSA.APR.C.4

When factoring we always look for what first?

• DOTS

• GCF

• Factor By Grouping