Factoring: Difference of Squares

Factoring:
Difference of Squares

Difference of squares intro (video) | Khan Academy

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Multiple Choice

x² - 9

• (x + 3) (x - 3)
• (x - 3) (x - 3)
• (x + 3) (x - 6)
• Can't factor using Diff. of Squares

Multiple Choice

4a² - 25

• (2a + 5) (2a - 5)
• (2a - 5) (2a - 5)
• (x + 5) (x - 5)
• Can't factor using Diff. of Squares

Multiple Choice

4m² + 49

• (2m + 7) (2m - 7)
• (2m - 7) (2m - 7)
• (m + 7) (m - 7)
• Can't factor using Diff. of Squares

Multiple Choice

q² - 121

• (q + 11) (q - 11)
• (q - 11) (q - 11)
• (q + 11) (q + 11)
• Can't factor using Diff. of Squares

Multiple Choice

r⁴ - q⁴

• (r² + q²) (r² - q²)
• (r² - q²) (r² - q²)
• (r + q) (r - q)
• Can't factor using Diff. of Squares

Multiple Choice

9n² + 1

• (3n + 1) (3n - 1)
• (3n - 1) (3n - 1)
• (n + 3) (n - 3)
• Can't factor using Diff. of Squares

Multiple Choice

x² + 81

• ( x - 9 ) ( x - 9 )

• ( x - 9 ) ( x + 9 )

• ( x + 9 ) ( x + 9 )

• Can't factor using Diff. of Squares

Multiple Choice

$$49x^2-36$$  

• Not Factorable

• $$\left(7x-9\right)\left(7x+4\right)$$  

• $$\left(7x-4\right)\left(7x+9\right)$$  

• $$\left(7x+6\right)\left(7x-6\right)$$