Question

Oblicz :
(1 1/3) do potęgi -2 - (-2) do potęgi 5 : 3 do potęgi 0
1/4 (2x-2)do potęgi 2 - 1/9(3x-1) do potęgi 2+ 1/3(x+1/3)=
(2x-y) (2x+y) - 2y (3y+x)=

Answer 1

(4/3)^{-2} - (-2)^{5} : 3^{0}=9/16 - (-32):1=9/16 + 32 = 32 9/16

0,25(2x-2)^{2} - 1/9(3x-1)^{2} + 1/3(x+1/3)=
=0,25(4x^{2}-8x+4)-1/9(9x^{2}-6x+1)+1/3x+1/9=
=x^{2}-2x+1-x^{2}+2/3x-1/9+1/3x+1/9=
=-2x+1+x=-x+1

(2x-y)(2x+y)-2y(3y+x)=4x^{2}-y^{2}-6y^{2}-2xy=4x^{2}-7y^{2}-2xy