Question 649606
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Hi,
(y^2+20y+100)-49x^2
(y+10)^2 - 49x^2
Check Factoring (y+10)(y+10) Using FOIL
F	First terms
O	Outside terms
I	Inside terms
L	Last terms
Again, might consider factoring twice depending on instructions given
(y+10)^2 - 49x^2
((y+10) + 7x)((y+10) - 7x)