Rozwiąż równanie.
x/2=8/x
Potrzebuje pilnie na jutroo!!! ;DD
Z: x≠0
x*x=2*8
x²=16
x=4 lub x=-4
x/2 = 8/x Z: x ≠ 0
mnożymy "na krzyż"
x² = 16
x²-16 = 0
(x+4)(x-4) = 0
x+4 = 0
x = -4
lub
x-4 = 0
x = 4
x = -4 v x = 4
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Z: x≠0
x*x=2*8
x²=16
x=4 lub x=-4
x/2 = 8/x Z: x ≠ 0
mnożymy "na krzyż"
x² = 16
x²-16 = 0
(x+4)(x-4) = 0
x+4 = 0
x = -4
lub
x-4 = 0
x = 4
x = -4 v x = 4