Oblicz i zredukuj
n2+n-7+3n2-n+16= dla n = - 1/2
n2 ( n do potęgi 2 )
- 1/2 ( - jedna druga w ułamku )
1/4 - 1/2 -7 + 3/4 +1/2 + 16 = 9 1/4
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1/4 - 1/2 -7 + 3/4 +1/2 + 16 = 9 1/4