Question

Is there a way I can easily determine when an expression is not factorable, such as

25x^2+70xy+14y^2

Answer 1

yes, there is.

Answer 2

Well?

Answer 3

compare it with \(ax^2+bxy+cy^2\)
find a,b,c
if b^2-4ac is a perfect square, then it is factorizable .

Answer 4

Is there another way, an easier way?

Answer 5

this is easiest!

Answer 6

But any way of multiplying the numvers and finding out because Im not familiar with ax2+bxy+cy2

Answer 7

70^2 -4 * 25*14
how difficult is that ?