Question

(7√2-3√3)(7√2+3√3) пожалуйста помогите!

Answer 1

(7√2-3√3)(7√2+3√3) = (7√2)^2-(3√3)^2 = 49 * 2 - 9 * 3 = 98 - 27 = 71

Answer 2

(7√2)²-(3√3)²=49*2-9*3=98-27=71