Question

(5√2-√18)·√2
(3-√2)² (Помогите) ))

Answer 1

(5√2-√18)·√2=(5√2-√9·√2)·√2=(5√2-3√2)·√2=2√2·√2=2·2=4
(3-√2)²=9+2-6√2=11-6√2