# How does #t^2-2t-1=0# become #t=1+-sqrt2#?

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An alternate way using the quadratic formula:

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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.

- What is the vertex form of #y= (x+2) (2x+5) #?
- How do you find the vertex of #g(x)=3x^2-24x-110#?
- How do you solve #x^2+10x-1=0# by completing the square?
- How do you write #f(x) = 3x^2 - 6x + 9# into vertex form?
- How do you use the discriminant to determine the nature of the solutions given # 9m^2 + 24m + 16 = 0#?

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