zad1 Zapisz w najprostszej postaci:
Daje naj za wszystko zrobione dobrze błedne odpowieszi bede zglaszane
a)(a+3)(a-1)+(a-7)(a+5)
b)(26-5)(3-2b)-(3b+2)(b-6)
c)-7c-kwadrat(5c-4)+(3c-kwadrat+c)(6-2c)
d)-2x(3x-5y)-(x+2y)(3x-y)
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a)a^2-a+3a-3+a^2+5a-7a-35=2a^2-38
b)21*(3-2b)-(3b^2-18b+2b-12)=63-42b-3b^2+16b+12=-3b^2-26b+12
c)-35c^3+28c^2+18c^2-6c^3+6c-2c^2=-41c^3+44c^2+6c
d)-6x^2+10xy-3x^2+xy-6xy+2y^2=-9x^2+5xy+2y^2