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{[(5·397-17·5):([tex] 2^{2}[/tex]·5-1)+(1985:392)²]:[tex] 5^{2}[/tex]+[tex] 3^{2}[/tex]·5}:[tex] 5^{2}[/tex]=Calculeaza

Răspuns :

={[(1985-85):(4·5-1)+5²]:25+9·5}:25=
={[1900:19+25]:25+45}:25
=[(100+25):25+45]:25
=(125:25+45):25
=(5+45):25
=50:25=2
{[(5·397-17·5):(2²·5-1)+(1985:397)²]:5²+3²·5}:5²=
{[(1985-85):19+5²]:25+9·5}:25=
[(1900:19+25):25+45]:25=
(125:25+45):25=
50:25=2