Question

упростите выражения
$sqrt{12} ( sqrt{21} + sqrt{3} )-3 sqrt{28}$

Answer 1

√12 · (√21 + √3) - 3√28 =
= 2√3 · (√3 · √7 + √3) - 6√7 =
= 2√3 · √3 (√7 + 1) - 6√7 =
= 6√7 + 6 - 6√7 = 6

Answer 2

√12*√21+√12*√3-3√28=√12*21 +√12*3-3√28=√252+√36-3√4*7=6√7+6-6√7=6