Question

Dati factor comun si apoi efectuati:
a.$\frac{9}{14} * ( - \frac{2}{3} )+(- \frac{2}{3} )x( \frac{1}{28} )+( - \frac{2}{3} ) * \frac{3}{7}$
b.1,4*$(- \frac{5}{12} )+1.4*(+ \frac{1}{6} )+( - \frac{3}{2} )*1,4$

Answer 1

a)=-2/3(9/14+1/28+3/7)=
=-2/3 [(9x2+1+3x4)/28]=
=-2/3x[(18+1+12)/28]=
=-2/3x31/28=-1/3x31/14=-31/42=-0,7(380952)

b)=14/10x(-5/12+1/6-3/2)=
=14/10x[(-5+1x2-3x6)/12=
=14/10x[(-5+2-18)/12]=
=14/10x(-21/12)=7/10x(-21/6)=-147/60=-2,45