Factor the polynomial completely using the X method.

x2 + 13x – 48

An x-method chart shows the product a c at the top of x and b at the bottom of x. Above the chart is the expression a x squared + 13 x minus 48.
What is the four-term polynomial and factored form of the polynomial?

x2 + 7x + 6x – 48 = (x + 7)(x + 6)
x2 – 12x + 4x – 48 = (x – 12)(x + 4)
x2 + 16x – 3x – 48 = (x + 16)(x – 3)
x2 – 16x + 3x – 48 = (x – 16)(x + 3)