a) 2x^2 - 8y dla x = -3 y = -2
2*(-3)^2 - 8*(-2) =
= 2*9+8*2=
=18+16=
=34
b) (m^3 + 4n)/6 dla m=1 n=2
(1^3+4*2)/6=
=(1+8)/6=
=9/6=
=1,5
c) 2,5(z-1)(z+1) z=5
2,5(5-1)(5+1)=
=2,5*4*6=
=10*6=
=60
d) a(b-7)^2 a=2 b=5
2(5-7)^2=
2*(-2)^2=
=2*4=
=8
e) cd^2-c^2d c=-1 d=-2
-1*(-2)^2-(-1)^2*(-2)=
=-1*4-1*(-2)=
=-4+2=
=-2
f) p^2(2r-3) p=-2 r=6
(-2)^2(2*6-3)=
= (-2)^2(12-3)=
=4*9=
=36
