(5akar2-2)persegi=tolong jawab ya

(5√2 - 2)²
= (5√2)² + 2(5√2)(-2) + (-2)²
= 50 - 20√2 + 4
= 54 - 20√2

=(5√2-2)•(5√2-2)
=25√4-10√2-5√2+4
=25(2)-15√2+4
=50+4-15√2
=54-15√2