Posted - 02/11/2011 : 12:02:02
Originally posted by crazymath44
I'm confused with taking these problems to the next step..can someone help please?
First factorize all the terms
= 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)
Please share your work with us indicating exactly where you are stuck - so that we may know where to begin to help you.
4)c-d please show me the answers with steps..i just need a little assistance to get me started. Thanks so much!