Factor, X^2-1, X^2-9, X^2+4, X^2-25, 9y^2-16, 4x^2-25

Factor
x^2-1
x^2-9
x^2+4
x^2-25
9y^2-16
4x^2-25

 

Answer:

x² - 1

= (x + 1)(x - 1)

x² - 9

= (x + 3)(x - 3)

x² + 4

= (x + 2)(x + 2)

x² - 25

= (x + 5)(x - 5)

9y² - 16

= (3y + 4)(3y - 4)

4x² - 25

= (2x + 5)(2x - 5)