((6-4sqrt2)/(sqrt2-1))-2sqrt2

Question

((6-4sqrt2)/(sqrt2-1))-2sqrt2

Answer 1

(6-4√2)/(√2-1)-2√2=(6-4√2-4+2√2)/(√2-1)=(2-2√2)/(√2-1)=-2(√2-1)/(√2-1)=-2