Question

what value, in place of the question mark, makes the polynomial below a perfect square trinomial?
...
x^2+14x+ ?

Answer 1

Look at a^2 + 2ab + b^2 = (a + b)(a + b)
Now copmpare with what you have:
a^2 = 1 so a = 1
The middle term is 2ab, and you have 14x, so
2abx = 14x, but a = 1 so
2b = 14
b = 7
The last term of the trinomial is b^2, and b = 7,
so b^2 = ______

Answer 2

is it 49, lol

Answer 3

right

Answer 4

okay, thanks (: