Anonymous

Can You Find X And Y Intercepts Of X^4 - 8x^2 - 9?

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Oddman Profile
Oddman answered
You appear to be interested in the equation
y = x4 - 8x2 - 9

This factors as
y = (x2+1)(x2-9) = (x2+1)(x-3)(x+3)

It has x intercepts of x = {-3, +3} and a y intercept of -9.

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