Помогите решить (8+3√2)*(8-√18) (√7-√5)*(√63+3√5)

Question

Помогите решить (8+3√2)*(8-√18) (√7-√5)*(√63+3√5)

Answer 1

(8+3√2)*(8-√18)  = (8+3√2)*(8-3√2)  = 64 - 18 = 46

(√7-√5)*(√63+3√5) = (√7-√5)*(3√7+3√5) = 3(√7-√5)*(√7+√5) = 3(7 - 5) = 6

Answer 2

√18=3√2

(8+3√2)(8-3√2)=64-18=46
√63=3√7
(√7-√5)*3(√7+√5)=3(7-5)=6