Doprowadź do najprostszej postaci .
a)
2(1/2x-y)^2-6(2/3x+1)(2/3x-1)
b)
-9(1/3x-y)^2-5(2/5x+y)(2/5x-y)
z góry dziękuje : )
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a)4/3x+4-x+y
b)1/3x+2/5x+y