Question

упростите выражение 14.4​

Answer 1

Объяснение:

3)

$2,1ab^2:(\frac{4}{3}b^2)-2,7at^3:(\frac{8}{9}t^3)=\frac{\frac{21}{10}ab^2 }{\frac{4}{3}b^2 } -\frac{\frac{27}{10}at^3 }{\frac{8}{9}t^3 } =\frac{21*3}{4*10} a-\frac{27*9}{8*10} a=\\=\frac{63}{40} a-\frac{243}{80} a=\frac{2*63-243}{80}a=\frac{126-243}{80}a=- \frac{117}{80}a=-1\frac{37}{80}a.$

4)

$6\frac{1}{4}c^2d:(2\frac{1}{2}cd)+8\frac{1}{4}c^2t^3:(5\frac{1}{2}ct^2 )=\frac{\frac{25}{4} c^2d}{\frac{5}{2}cd } +\frac{\frac{33}{4}c^2t^2 }{\frac{11}{2}ct^2 }=\frac{25*2}{4*5}c+\frac{33*2}{4*11}c=\\=\frac{5}{2}c+ \frac{3}{2}c=\frac{8}{2}c=4c.$