rozwiąż równanie -(x-6)^2=(3-x)(3+x)
-x^2+12x-36)= 9-x^2
12x=9+36 /:12
x=45/12=15/4
x=3,75
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-x^2+12x-36)= 9-x^2
12x=9+36 /:12
x=45/12=15/4
x=3,75