a)
[tex]x=-3 \ oraz \ y=-2\\\\2x^2-8y=2\cdot(-3)^2-8\cdot(-2)=2\cdot9+16=18+16=34[/tex]
b)
[tex]m=1 \ oraz \ n=2\\\\\frac{m^3+4n}{6}=\frac{1^3+4\cdot2}{6}=\frac{1+8}{6}=\frac{9}{6}=1,5[/tex]
c)
[tex]z=5\\\\2,5\cdot(z-1)(z+1)=2,5\cdot(5-1)(5+1)=2,5\cdot4\cdot6=10\cdot6=60[/tex]
d)
[tex]a=2 \ oraz \ b=7\\\\a(b-7)^2=2(7-7)^2=2\cdot0^2=2\cdot0=0[/tex]
e)
[tex]c=-1 \ oraz \ d=-2\\\\cd^2-c^2d=-1\cdot(-2)^2-(-1)^2\cdot(-2)=-1\cdot4-1\cdot(-2)=-6+2=-4[/tex]
f)
[tex]p=-2 \ oraz \ r=6\\\\p^2(2r-3)=(-2)^2\cdot(2\cdot6-3)=4\cdot(12-3)=4\cdot9=36[/tex]
