zadanie.oblicz wartość wyrażeń algebraicznych, jeżeli x=-2, y=5
a)
3x - 2y = 3·(-2) - 2·5 = -6-10 = -16
b)
y-x/2 · y = 5-(-2)/2 ·5 = 5+2/2 ·5 = 7/2·5 = 3,5·5 = 17,5
c)
3 1/3x-2 2/5y = 3 1/3·(-2) - 2 2/5·5 = -6 2/3 - 10 10/5 = -6 2/3 - 12 = -18 2/3
d)
0,5x+0,2y = 0,5·(-2)+0,2·5 = -1+1 = 0
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a)
3x - 2y = 3·(-2) - 2·5 = -6-10 = -16
b)
y-x/2 · y = 5-(-2)/2 ·5 = 5+2/2 ·5 = 7/2·5 = 3,5·5 = 17,5
c)
3 1/3x-2 2/5y = 3 1/3·(-2) - 2 2/5·5 = -6 2/3 - 10 10/5 = -6 2/3 - 12 = -18 2/3
d)
0,5x+0,2y = 0,5·(-2)+0,2·5 = -1+1 = 0