factor completely 9x^2-25?
回答 (7)
2008-02-23 9:33 am
✔ 最佳答案
(3x - 5)(3x + 5)Check
9x² + 15x - 15x - 25
9x² - 25 (as required)
2008-02-23 2:31 pm
(3x + 5)(3x - 5)
2008-02-23 2:32 pm
Difference of squares:
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)
2008-02-23 4:01 pm
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)
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
=)
2008-02-23 2:31 pm
(3x-5)(3x+5)
2008-02-23 2:31 pm
9x^2 - 25
= (3x - 5)(3x + 5)
= (3x - 5)(3x + 5)
2008-02-23 4:38 pm
yeah,
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)
HAve FuN..!!!
9x² - 25 = (3x)² - 5²
= (3x + 5)(3x - 5)
HAve FuN..!!!
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