16c^2-49 -> (4x-7)(4x+7)
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An infinity of expressions equal 49.
Nothing is a factor BY ITSELF; you can say that one expression is a factor OF ANOTHER EXPRESSION. IF you don't specify the other expression, the question is meaningless.
The Greatest Common Factor of 14, 43, 49 is 1.
Well, honey, the factor rainbow for 49 is as simple as it gets. Just picture a rainbow with two colors: 7 and 49. That's right, 49 is only divisible by 1, 7, and 49 itself. So, there you have it, a short and sweet factor rainbow for ya!
It is 5*f where f is an expression.