ПОМОГИТЕ СРОЧНО - ДАЮ 20 БАЛОВ
1) −5∙(−7)
2) (х−8,5)(2х−7)= 0
3) 12∙(−7)
4) −0,4∙ 1,5
1) −5∙(−7)
2) (х−8,5)(2х−7)= 0
3) 12∙(−7)
4) −0,4∙ 1,5
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Answers & Comments
2) х-8.5*2х-7＝0
х-2х＝0+8.5+7
-х＝15.5
х＝-15.5
3) -（12*7) ＝84＝-84
4) -(0.4*1.5)＝0.6＝-0.6