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求める整数をxとおく。
(x+4)(x+7)=18
x^2+11x+28=18
x^2+11x+10=0
(x+10)(x+1)=0
x=-10,-1
よって求める整数は、-10,-1
2つめの問題は端っこが映ってなくて解けません、、、
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ありがとうございます !!
2問目はこれです!