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9x^=25 |:9
x^=2i7/9
x=√25/9
x=5/3 lub -5/3
x=1i2/3 lub -1i2/3
(3x-5)(3x+5)
3x+5=0/-5
3x=-5/:3
x=-1⅔
3x-5=0/+5
3x=5/:3
x=1⅔