You will FOIL this out to simplify. First outers, inners last. 2*1 = 2; 2*2sqrt7 = 4sqrt7; -sqrt7*1=-sqrt7; -sqrt7*2sqrt7 = 2sqrt49. This is what all that looks like: [tex]2+4 \sqrt{7}- \sqrt{7}-2 \sqrt{49} [/tex]. Combining like terms we have [tex]2+3 \sqrt{7} -2 \sqrt{49} [/tex]. The sqrt 49 is equal to 7, so we can continue simplifying: [tex]2+3 \sqrt{7}-2(7) [/tex] which equals [tex]2+3 \sqrt{7}-14 [/tex]. Finally, [tex]-12+3 \sqrt{7} [/tex]. Or, putting the positive term first, it would also be correct to write [tex]3 \sqrt{7}-12 [/tex]
