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Mathematics
Zane Zhang
13 April, 12:14
Factor the expression X^4+6X^2 - 7 completely.
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Buttons
13 April, 12:40
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Answer: (x - 1) (x + 1) (x + 7) ²
Step-by-step explanation:
x⁴ + 6x² - 7
find two numbers whose product is - 7 and sum is + 6 - -> - 1 & 7
Those values go into the parenthesis: (x² - 1) (x + 7) ²
Notice that (x² - 1) is the difference of squares - -> (x - 1) (x + 1)
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