Mathematics
Junior High
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(x-3y)(x-4y)の解き方で解くと、
途中式はどのようになるのですか??

答えは-2√2です.ᐟ.ᐟ.ᐟ.ᐟ

(5) エ=3/2 +8, y=V2+2のとき, ご-7.xy+12gの値を求めなさい。〈大阪〉

Answers

✨ Best Answer ✨

(x-3y)(x-4y)
= {(3√2+8)-3(√2+2)} {(3√2+8)-4(√2+2)}
= (3√2+8-3√2-6)(3√2+8-4√2-8)
= 2 × (-√2)
= -2√2

𝚢𝚞𝚊

ありがとうございます☺️

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