# How do you solve for #r# : #q - 3r = 2# ?

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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 divide #(-x^4-3x^3-2x^2+7x-7)/(x^2+3) #?
- How do you simplify #(x^2 - 4x + 4 - y^2)/( 2x^2 - 11x + 15) * (x^4 y)/ (x- 2 + y) div (x^3 y - 2x^2y - x^2 y^2)/( 3x -9)#?
- How do you simplify #(x^2 - x - 6) /( x^2 - 4)#?
- What is the LCD between #x/(x^2 - 81 )# and #(3x)/(x^2+18x +81)#?
- How do you simplify #[(X+2) / (X-1)] = [1/2]#?

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