Question

4x2 + , x + 49

Answer 1

Is it \[4x^{2}, x+49\]?

Answer 2

What is your question exactly?

Answer 3

4x^2______x+49 perfect square trinomials

Answer 4

4x^2 - 49

This follows the form of ax^2 - b, so you'd use the formula (sqrt(a) * x + sqrt(b))(sqrt(a) * x - sqrt(b)):
(2x + 7)(2x - 7)

As another example of the formula, factoring the following:
9x^2 - 100 = (3x + 10)(3x - 10)
36x^2 - 169 = (6x + 13)(6x - 13)

Another way to look at it is this:
a = 4x^2
b = 49
(sqrt(a) + sqrt(b))(sqrt(a) - sqrt(b))