Posted - 02/09/2011 : 19:01:57 I'm confused with taking these problems to the next step..can someone help please? 1) 63c-7 2) x-4x 3) 4a-36 4)c-d please show me the answers with steps..i just need a little assistance to get me started. Thanks so much!

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Subhotosh Khan

Posted - 02/11/2011 : 12:02:02

quote:Originally posted by crazymath44

I'm confused with taking these problems to the next step..can someone help please? 1) 63c-7

First factorize all the terms

63c-7

= 9 * 7 * c * c - 7

Now look for common factor in the terms. We see that 7 is common in the first and the second term. Factor it out:

= 7 * (9 * c- 1)

Now we see that we can re-write the terms within the parenthesis as difference of two squares.

= 7 * [(3 * c) - 1]

Futrther factorize the terms using difference of squares formula which states a - b = (a+b)*(a-b)

continue...

Please share your work with us indicating exactly where you are stuck - so that we may know where to begin to help you.

2) x-4x 3) 4a-36 4)c-d please show me the answers with steps..i just need a little assistance to get me started. Thanks so much!