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Daca x-2y=3,calculati valoarea numarului :a=(2x-4y)+(3x-6y)²+(4x-8y)³

Răspuns :

a=2*3+(3*3)²+(3*4)³
a=6+81+144*12
a=87+1728
a=1815

sper ca te-am ajutat!

[tex]a=(2x-4y)+(3x-6y)^2 +(4x-8y)^3\\ a=2(x-2)+[3(x-2y)]^3+[4(x-2y)]^3\\ a=2*3+(3*3)^2+(4*3)^3\\ a=6+9^2+12^3\\a=6+81+1728\\a=1815[/tex]