1) f(-2)=1/2*2²-3*2=1/2*4-6=2-6=-4
f(-3)=1/2*(-3)²-3*(-3)=1/2*9+9=4.5+9=13.5
2) 1/2x²-3x=0
x(1/2x-3)=0
x=0 1/2x-3=0
1/2x=3
x=6
нули функции: x=0, x=6
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Answers & Comments
1) f(-2)=1/2*2²-3*2=1/2*4-6=2-6=-4
f(-3)=1/2*(-3)²-3*(-3)=1/2*9+9=4.5+9=13.5
2) 1/2x²-3x=0
x(1/2x-3)=0
x=0 1/2x-3=0
1/2x=3
x=6
нули функции: x=0, x=6