Oblicz wartość wyrażenia dla ( to / jest kreska ulamkowa) x=-3/4 i y=-1/3
a)4xy-2x kwadrat - 3y kwadrat
b)-1/2(xy kwadrat)
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4xy-2x kwadrat - 3y kwadrat=4*(-3/4)*(-1/3)-2*(-3/4)kwadrat-3*(-1/3)kwadrat=
1-9/8-1/3=1-27/24-9/24=-1/2
-1/2(xy kwadrat)=-1/2{(-3/4)*(-1/3)kwadrat)}=-3/72