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x2 + 49

= x2 - (-49)

= x2 - (-1)(49)

= x2 - (i2)(72)

= x2 - (7i)2

= (x - 7i)(x + 7i)

where i is the imaginary square root of -1.

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Wiki User

12y ago
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Anonymous

Lvl 1
4y ago

(X+7)(x-7)

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Q: What is x2 plus 49?
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