How do you simplify (- 3\sqrt { 7} + 2\sqrt { 2} ) ^ { 2} ?

1 Answer
May 16, 2018

(-3sqrt7+2sqrt2)^2=
(2sqrt2-3sqrt7)^2=
((2sqrt2)^2-2*(2sqrt2)(3sqrt7)+(3sqrt7)^2)=
(4*2-2*6sqrt14+9*7)=
8-12sqrt14+63=
71-12sqrt14