First, let me start by saying if you want to express "x squared", please don't type x2. That would be represented as x^2 (x to the second power).
Now...
Quote:
Originally posted by Randerolf
[B][b]Question 1 - Factor each polynomial
20z2 + 18x2 – 8zx – 45zx
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if this really reads as 20z^2 + 18x^2 - 8zx - 45zx, then the first thing you do is combine like terms (the - 8zx and the - 45zx). This would then give you the expression 20z^2 - 53zx +18x^2. This new expression I hope you can factor with no problems.
Quote:
Question 2 – Simplify the rational expression by reducing to lowest terms.
8x3 – 27_____
8x2 – 14x + 3
Next __ ?___________
(4x - ?)(2x- ? )
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trying to make fractions in text is not working for my eyes (especially when I hit "quote" and see a bunch of mess...)
But I think you were trying to say:
(8x^3 - 27) / (8x^2 - 14x + 3)
The numerator is the difference of cubes (both terms are a perfect cube and one is being subtracted from the other). And the difference of cubes can be factored as A^3 - B^3 = (A - B)(A^2 + AB + B^2). The denominator is also factorable. After you factor both numerator and denominator, you will see that something will cancel.
Start with those. And I'll get back to you on the rest.