Question

(✓28-✓7)умножаем на✓7

Answer 1

28*7=196. √196=14. 14-7=7

Answer 2

$(sqrt{2^2*7}-sqrt{7}) *sqrt{7}$

$(2sqrt{7} -sqrt{7} )*sqrt{7}$

$sqrt{7}*sqrt{7}$

$sqrt{7*7}$

$sqrt{7^2}$

$7$