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dokładnie rozpisane:
a )2a²-4 dla a= ½
2 * (1/2)² - 4 = 2 * 1/4 - 4 = 1/2 - 4 = -3 i 1/2 czyli 3,5
b) (½ a + 2b ) × (-3) dla a= -4 dla b = ½
[1/2 * (-4) + 2 * 1/2] * (-3) = [(-2) + 1] * (-3) = (-1) * (-3) = 3
b)[½*(-4)+ 2*½]* (-3)=( -2+1)*(-3)=-1*(-3)=3
* oznacza mnozenie
b)[0.5*(-4)+2*0.5]*(-3)=(-2+1)*(-3)=(-1)*(-3)=3
*-mnożenie
0.5-inaczej 1/2