ex nr 1
a)x=0
2x²-3x=
2×0²-3×0=0-0=0
b)x=-2
2×(-2)²-3×(-2)=
2×4+6=
8+6=14
c)x=0,5
2×(0,5)²-3×0,5=
2×0,25-1,5=
0,5-1,5=-1
d)x=1|6
2×1|6-3×1|6=
2|6-3|6=-1|6
|⇒linie de fractie
4ab-b²+a
a)a=2
b=2
4×2×2-4+2=14
b)a=3
b=-2
4×3×(-2)-(-2)²+3=
-24-4+3=-25
c)a=-4 b=1,5
4×(-4)×1,5-(1,5)²+(-4)=
-16×1,5-2,25-4=
-24-6,25=-30,25
d)a=3|4
b=4|3
4(3|4×4|3)-(4|3)²+3|4=
4-16|9+3|4=
144-64+27|36=107|36
succes
