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Zapisz w najprostszej postaci wyrażenie (3z-8)² - 5(3+2z)² + (4z+3)² i oblicz jego wartość dla z=10

Wykonaj działania

a) (5a+1)² + (5a-1)² - (5a+1)(5a-1)-25a²

b) (x+3y)(3y-x) - 2(x-2)² + 3(x² -3y² )


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