✨ Best Answer ✨
X=x-2とおく
(x-2)²-16
=X²-4²
=(X+4)(X-4)
元に戻す
=(x-2+4)(x-2-4)
=(x+2)(x-6)
✨ Best Answer ✨
X=x-2とおく
(x-2)²-16
=X²-4²
=(X+4)(X-4)
元に戻す
=(x-2+4)(x-2-4)
=(x+2)(x-6)
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