Odpowiedź:
a) a=2, b=3
a+b+ab
2+3+2*3=5+6=11
b) a=-2, b=-3
a-b-ab
(-2)-(-3)-(-2)*(-3)=-2+3-6=-8+5=-5
c) a=-2, b=1/2
a²+ab-b²
(-2)²+(-2)*1/2-(1/2)²=4-1-1/4=2 3/4
d) x=1/3
2x²-2x³=2*(1/3)²-2*(1/3)³=2*1/9-2*1/27=2/9-2/27=6/27-2/27=4/27
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B)-2-(-3)-(-2*-3)=-5
Odpowiedź:
a) a=2, b=3
a+b+ab
2+3+2*3=5+6=11
b) a=-2, b=-3
a-b-ab
(-2)-(-3)-(-2)*(-3)=-2+3-6=-8+5=-5
c) a=-2, b=1/2
a²+ab-b²
(-2)²+(-2)*1/2-(1/2)²=4-1-1/4=2 3/4
d) x=1/3
2x²-2x³=2*(1/3)²-2*(1/3)³=2*1/9-2*1/27=2/9-2/27=6/27-2/27=4/27
Szczegółowe wyjaśnienie: