Решить уравнения 4∙10x–5∙2x+2–8∙5x+40=0
(4∙10x––8∙5x)–(5∙2x+2–40)=0 4·5x·(2x–2)–20·(2x–2)=0 4·(2x–2)·(5x–5)=0 x=1