How do you know if 49x^2 − 28x + 16 is a perfect square trinomial and how do you factor it?
1 Answer
Jun 8, 2015
I usually try to calculate the
You can calculate it using the formula
So in this case you have
So you can't even factor this trinomial.
To sum up the concept:
Delta_x<0 -> not factorizableDelta_x=0 -> perfect square (writable as(x-a)^2 )Delta_x>0 -> factorizable in the form(x-a)(x-b)