Odpowiedź:
3.
a) 14
b) 40
c) 0
d) -17/2 = -8i1/2 (- 8 całych i 1/2)
Szczegółowe wyjaśnienie:
a) 5x + 6y dla x = - 2, y = 4 to = 5•(-2) + 6•4 = -10 + 24 = 14
b) 6x - xy dla x = 5, y = -2 to = 6•5 - 5•(-2) = 30 + 10 = 40
c) x/2 + y² dla x = -8, y = -2 to = -8/2 + (-2)² = - 4 + 4 = 0
d) 2xy - 2y² dla x = 4, y = -1/2 to = 2•4•(-1/2) - 2•(-1/2)² = - 8 - 1/2 =
-16/2 - 1/2 = -17/2 = -8i1/2 (- 8 całych i 1/2)
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Odpowiedź:
3.
a) 14
b) 40
c) 0
d) -17/2 = -8i1/2 (- 8 całych i 1/2)
Szczegółowe wyjaśnienie:
3.
a) 5x + 6y dla x = - 2, y = 4 to = 5•(-2) + 6•4 = -10 + 24 = 14
b) 6x - xy dla x = 5, y = -2 to = 6•5 - 5•(-2) = 30 + 10 = 40
c) x/2 + y² dla x = -8, y = -2 to = -8/2 + (-2)² = - 4 + 4 = 0
d) 2xy - 2y² dla x = 4, y = -1/2 to = 2•4•(-1/2) - 2•(-1/2)² = - 8 - 1/2 =
-16/2 - 1/2 = -17/2 = -8i1/2 (- 8 całych i 1/2)