Question

simplify (4 +root 3 ) (4-root 3)

Answer 1

answer is 13, refer to the attached file

Answer 2

$(4 + \sqrt{3} ) \times( 4 - \sqrt{3) } \\ = {4 }^{2} - { \sqrt{3} }^{2} \\ = 16 - 3 \\ = 13$