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OpenStudy (anonymous):
Solve:x^4-34x^2=-225 a. no solution b.3,-5 c.3,-3,5,-5 d.3,-3
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OpenStudy (anonymous):
i got x=+/- 5 and +/- 3 so the answer is c :)
OpenStudy (anonymous):
x^(4)-34x^(2)=-225 x^(4)-34x^(2)+225=0 (x^(2)-9)(x^(2)-25)=0 (x-3)(x+3)(x^(2)-25)=0 (x-3)(x+3)(x-5)(x+5)=0 x-3=0_x+3=0_x-5=0_x+5=0 x=3,-3,5,-5
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