Oblicz wyrażenie.
6z(do kwadratu)-48z+64-45-60z-20z(do kwadratu)+16z(do kwadratu)+24z+9=
6z²-48z+64-45-60z-20z²+16z²+24z+9=2z²-84z+28
6z²-48z+64-45-60z-20z²+16z²+24z+9=2z²-84z+28=2(z²-42z+14)
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6z²-48z+64-45-60z-20z²+16z²+24z+9=2z²-84z+28
6z²-48z+64-45-60z-20z²+16z²+24z+9=2z²-84z+28=2(z²-42z+14)