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OpenStudy (anonymous):
Factor x^4+21x^2-100
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rishavraj (rishavraj):
clue 25 * -4 = 1-00 25 - 4 = 21
rishavraj (rishavraj):
i meant -100
OpenStudy (anonymous):
So I guess I could use the difference of squares?
rishavraj (rishavraj):
hmmmm i dont think so x^4 + 21x^2 - 100 = 0 x^4 - 4x^2 + 25x^2 - 100 = 0
OpenStudy (anonymous):
And then factor by grouping yes?
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rishavraj (rishavraj):
yeah @PrincessDeliah
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