1

4

100

8

( x³ - 4)

( x² - 3)

( x² + 4)

( x² - 4)

Look for the GCF

Write a, b, and c

Difference of squares

Group

(4x-9)(4x+9)

(2x-3)(2x+3)

2x-3

(2x-4.5)(2x+4.5)

144x² - 49y²

x² + 4x - 12

100x² + 20x + 1

14x - 16

We can factor because there is addition sign.

We can factor because there is a perfect squared number (Example: x², 25, 49)

Formula: a² - b² = (a + b) (a - b)

We can factor because there is minus sign.

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.

( d+ 2)

( d - 2)

( d + 4)

(d - 4)

Because 51 is not a perfect cubed number.

Because 51 is not a perfect squared number.

Because 25 is not a perfect squared number.

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