Question

Factor completely: 49x^2 – 140x + 100

Answer 1

You always want to start seeing what value needs to be in front of x so...

49x^2 – 140x + 100
if we use 7x time 7x we can get our 49x^2, so from there we can see what other numbers we need to get the 140x and 100. basically we are doing reverse foil try looking at this:

http://www.freemathhelp.com/using-foil.html

(7x-10)(7x-10)=0

Answer 2

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