factor completely 9x^2-25?

(3x - 5)(3x + 5)
Check
9x² + 15x - 15x - 25
9x² - 25 (as required)

(3x + 5)(3x - 5)

Difference of squares:
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)

hi!

(3x + 5) (3x - 5)

i got both quantities with different signs

i got 3x because it is the square root of 9x^2

i got 5 because it is the square root of 25

ihope this helps

=)

(3x-5)(3x+5)

9x^2 - 25
= (3x - 5)(3x + 5)

yeah,
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)

HAve FuN..!!!