Question 90320: Please show me how to factor this polynomial completely:
4x^2-20x+25
Thank you so much!!
Answer by tutor_paul(519)   (Show Source):
You can put this solution on YOUR website! 
This is always a bit more difficult when the coefficient of x^2 is not a 1, but you can still do it!
The way to think about what the factors are is: What are the factors of 25, which, when added together and then are multiplied by the factors of 4, will give you -20? Ouch, that is a brain cramp. However, I know 5x5=25, and 2x2 is 4, so we can try that to see it it works...
Yes, it does. Prove it to yourself by multiplying out these factors and be sure you get the original expression.
Good Luck,
tutor_paul@yahoo.com
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