Question

СРОЧНО!!! Решите, пожалуйста!
(5√7 - √63 + √14) • √7 = ?

Answer 1

35-/49*9+/98=35-21+/98=14+/98

Answer 2

√63=√(7·9)=√7·√9
√14=√(2·7)=√2·√7

(5√7 - √63 + √14) • √7 =
=5·√7·√7-√9·√7·√7+√2·√7·√7=35-21+7√2=14+7√2