✨ Best Answer ✨
(A-B)²=A²-2AB+B²を利用すると、
(√12-√2)²
=(√12)²-2×√12×√2+(√2)²
=12-2×2√3×√2+2
=12-4√6+2
=14-4√6
∴√54+(√12-√2)²
=3√6+14-4√6
=14-√6
✨ Best Answer ✨
(A-B)²=A²-2AB+B²を利用すると、
(√12-√2)²
=(√12)²-2×√12×√2+(√2)²
=12-2×2√3×√2+2
=12-4√6+2
=14-4√6
∴√54+(√12-√2)²
=3√6+14-4√6
=14-√6
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