# How do you solve #x^4 – 8x^2 – 9 = 0#?

x can be 3, -3, i, or -i.

If you can't find the factoring by looking at this, simplify the equation.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you write a polynomial function in standard form with zeros at 4, 5, and 2?
- How do you write a polynomial function of least degree and leading coefficient 1 when the zeros are 4, 4, 2+i?
- How do you write a polynomial function of least degree and leading coefficient 1 when the zeros are 8, -i, i?
- How do you solve #x^3+2x^2 = 2# ?
- How do you sketch the general shape of #f(x)=-x^3+10x^2-33x+32# using end behavior?

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