Odpowiedź:
-3x^2-5x+2
1. x=1
-3•1-5•1+2=-3-5+2=-6
2. x=-2
-3•(-2)^2-5•(-2)+2=-12+10+2=0
3. x=2/3
-3(2/3)^2-5•(2/3)+2=-3•(4/9)-10/3+2=-4/3-10/3+2=
=-14/3+2=-4 2/3+2=-2 2/3
4. x=0
-3•0-5•0+2=0-0+2=2
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Odpowiedź:
-3x^2-5x+2
1. x=1
-3•1-5•1+2=-3-5+2=-6
2. x=-2
-3•(-2)^2-5•(-2)+2=-12+10+2=0
3. x=2/3
-3(2/3)^2-5•(2/3)+2=-3•(4/9)-10/3+2=-4/3-10/3+2=
=-14/3+2=-4 2/3+2=-2 2/3
4. x=0
-3•0-5•0+2=0-0+2=2