Question

Simplify: (5 + 2 *square root of 7)^2

A. 25+ 4*square root of 7
B. 53+ 20*square root of 7
C. 53

Answer 1

\[ (5+2\sqrt{7})(5+2\sqrt{7}) \]
in that form, you can use FOIL and simplify

Answer 2

i.e. 5*5 + (5*2sqrt(7)) + (5*2sqrt(7)) + (2sqrt(7))(2sqrt(7))

Answer 3

okay thnk you Access