September 2018 2 21 Report

Oblicz:

a) 2(x^{2}- 6xy+ 9y^{2})-3 ( x- 2y) (x+ 2y) + 12xy=

x= 3

y= 1

b) (-12xy + 9y^{2}) -x (4x+3y) - 9y^{2}=

x= 3

y= -3


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