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| Math Central | Quandaries & Queries |
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Question from Austin, a student: Z^4-10z^2=-9 |
Hi Austin,
Let x = z2 and the equation becomes
x2 - 10 x = -9.
Add 9 to each side of the equation, factor and solve for x. Then use z = x2 to solve for z.
Write back if you need more assistance,
Penny
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