Factor the polynomial completely using the X method. x2 + 16x + 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 x squared + 16 x + 48. Which equivalent four-term polynomial can be created using the X method? x2 + 8x + 8x + 48 x2 – 12x – 4x + 48 x2 + 12x + 4x + 48 x2 – 8x – 8x + 48