Вычислите (31.18-31.19)
[tex]\frac{37^2-47^2}{72^2-12^2} ;\frac{100^2-60^2}{70^2-90^2}[/tex]
[tex]\frac{37^2-47^2}{72^2-12^2} ;\frac{100^2-60^2}{70^2-90^2}[/tex]
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Ответ:
Пошаговое объяснение:
1)=(37-47)(37+47) / (72-12)(72+12)=-10*84 / 60*84=-10/60=-1/6
2)=(100-60)(100+60) / (70-90)(70+90)=40*160 / -20*160=40/-20=-2