Question

Cherry

この二問の解き方を教えてください！
よろしくお願いします🙇‍♀️💦

Answer 1

ヲカノ

x² = -8x
x²+8x = 0
x(x+8) = 0
x = 0, -8

x²-32=0
x² = 32
x = ±√32
= ±4√2