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ARTEMONUM
@ARTEMONUM
June 2022
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Найдите значение выражения:
1) [tex]-k(d-k)^{2} +6d(k-d)^{3} [/tex] при d=3,2; k=-0,8
2) [tex]m^{3} - m^{2}n - mn^{2} + n^{3} [/tex] при m=3,1; n=-1,9
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pomoshnik09
1) подставим 0,8(3,2+0,8)²+6*3,2(-0,8-3,2)³=0,8*4²+6*3,2*(-4)³=0,8*16+19,2*-64=
=12,8-1228,8=-1216
2) =(m³-m²n)-(mn²-n³)=m²(m-n)-n²(m-n)= (m-n)(m²-n²)=(m-n)*(m-n)(m+n)
(.31+1.9)(3.1+1.9)(3.1-1.9)=5*5*2.2=5*11=55
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Answers & Comments
=12,8-1228,8=-1216
2) =(m³-m²n)-(mn²-n³)=m²(m-n)-n²(m-n)= (m-n)(m²-n²)=(m-n)*(m-n)(m+n)
(.31+1.9)(3.1+1.9)(3.1-1.9)=5*5*2.2=5*11=55