Zadanie 1/113 Wyrażenia algebraiczne... w linku zadanko
http://books.google.pl/books?id=EHyL55ay4AoC&pg=PA113&lpg=PA113&dq=Zapisz+wyra%C5%BCenie+algebraiczne+wed%C5%82ug+podanego+przepisu+i+doprowad%C5%BA+je+do+najprostszej+postaci&source=bl&ots=p59ZZH7VEL&sig=QV3s_d6bVWmbA6qSTlXy8cn9Gds&hl=pl&ei=Lz4iTenBMoOV8QPq-vmCBQ&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBYQ6AEwAA#v=onepage&q=Zapisz%20wyra%C5%BCenie%20algebraiczne%20wed%C5%82ug%20podanego%20przepisu%20i%20doprowad%C5%BA%20je%20do%20najprostszej%20postaci&f=false
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Zad. 1/113
1. ³/₇ ·x
2. ³/₇ ·x - ³/₇
3. (³/₇ ·x - ³/₇)·⁷/₃
(a) (³/₇ ·x - ³/₇)·⁷/₃ = (-3)³
³/₇·⁷/₃·x-³/₇·⁷/₃=-27
x-1=-27
x=-26
(b) (³/₇ ·x - ³/₇)·⁷/₃ = √2
³/₇·⁷/₃·x-³/₇·⁷/₃=√2
x-1=√2
x=√2 -1
(c) (³/₇ ·x - ³/₇)·⁷/₃ = -1
³/₇·⁷/₃·x-³/₇·⁷/₃=-1
x-1=-1
x=0