Hi Monica, You need to realize that this expression means (2x+4)(2x+4). This is what the word 'squared' means. So, we have two binomials that are being multiplied. This calls for the FOIL method! :) FOIL = first, outer, inner, last This is the order at which we need to multiply the binomials. So, first: 2x•2x = 4x^2 Then outer:2x•4 =8x Then inner:4•2x = 8x Then last: 4•4 = 16 So we have this expression: 4x^2+8x+8x+16 We need to combine like terms to simplify. So, the above expression becomes 4x^2 + 16x +16 Easy right? :D Best of luck!