✨ Best Answer ✨
① x²+4x+4
=(x+2)²
=(198+2)²
=200²
=40000
② x²-y²
=(x+y)(x-y)
=(3.75+2.25)(3.75-2.25)
=6×1.5
=9
これの解き方教えてください。お願いします。
✨ Best Answer ✨
① x²+4x+4
=(x+2)²
=(198+2)²
=200²
=40000
② x²-y²
=(x+y)(x-y)
=(3.75+2.25)(3.75-2.25)
=6×1.5
=9
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