Question

2√а+6√а-7√а=√а(2+6-7)=
помогите

Answer 1

$2sqrt{a} +6 sqrt{a} -7 sqrt{a} = sqrt{a} (2+6-7)$
$2 sqrt{a} +6 sqrt{a} -7 sqrt{a} = sqrt{a}$
$sqrt{a} (2+6-7)=1* sqrt{a} = sqrt{a}$
$sqrt{a} = sqrt{a}$