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AleksAgata [21]
3 years ago
14

Factor completely 49x^2-81.

Mathematics
1 answer:
Tasya [4]3 years ago
5 0

Answer:

C.

Step-by-step explanation:

Since both terms are perfect squares, factor using the difference of squares formula to get you the answer

(7x+9)(7x-9)

 

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What number should be added to both sides in order to solve x^2 -8x=0
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Answer:

16

Step-by-step explanation:

x^2 -8x=0

rewrite in this form and add 16 to both sides:

x² + 2(- 4)x + 16 = 0 + 16

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x - 4 = ±  4

x =  4 ± 4

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8 0
4 years ago
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Step-by-step explanation:

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