Solve for all zeros, reduce as much as possible, show all work. x^4 + 14x^2 + 45 = 0

asked Jun 2, 2019 63.4k views

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first, factor it: (x²+5)(x²+9)=0
x²=-5=5i², or x²=-9=9i²
x=(√5)i, -(√5)i, 3i, or -3i

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