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 factorizable#Delta_x=0 -> # perfect square (writable as#(x-a)^2# )#Delta_x>0 -> # factorizable in the form#(x-a)(x-b)#