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schepotkina [342]
3 years ago
8

If x^2 - 16 > 0, which of the following must be true?

Mathematics
1 answer:
zimovet [89]3 years ago
5 0
The left hand side of the equation is a difference of two squares and may be factored out as follows,
                              (x - 4)(x + 4) > 0
They may be individually taken as,
                                     x - 4 > 0    ; x > 4
                                     x + 4 > 0   ; x < -4
Thus, the answer to this item is letter A. 
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This may help:

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