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Terrance Shannon
18 January, 16:56
Factor 9x^2-49y^2 Enter your answer in the box
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Nigel Harrington
18 January, 17:54
0
(3x - 7y) (3x + 7y)
Step-by-step explanation:
9x² - 49y² ← is a difference of squares and factors in general as
a² - b² = (a - b) (a + b)
here 9x² = (3x) ² ⇒ a = 3x and 49y² = (7y) ⇒ b = 7y
9x² - 49y²
= (3x) ² - (7y) ² = (3x - 7y) (3x + 7y)
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Walter Bray
18 January, 18:15
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(3x+7y) (3x-7y)
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