Question

Simplify (5√2-1)^2 please I need help

Answer 1

51-10sqrt(2)

Explanation:

(a-b)^2=a^2-2ab+b^2

(5sqrt(2)-1)^2=(5sqrt(2))^2-2(5sqrt(2))(1)+1^2

=5^2(2)-2(5sqrt(2))(1)+1^2

=25(2)-10sqrt(2)+1

=50-10sqrt(2)+1

=51-10sqrt(2)