AJUTOR !
Rezolvati ecuatia incat sase afle C^{2} ( C la puterea a doua ) 1875 ×
16 = ( 400- C^{2} ) × C^{2}
RPUNCTE + COROANA + MULTUMESC !!!
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1875 ×16 = ( 400- C² ) × C²
C²=x
1875 ×16 = (400-x) × x
x²-400x+30000=0
x²-300x-100x+30000=0
x(x-300)-100(x-300)=0
(x-300)(x-100)=0
x-300=0 x=300 C²=300 C=√300=+/-10√3
x-100=0 x=100 C²=100 C=√100=+/-10
C²=x
1875 ×16 = (400-x) × x
x²-400x+30000=0
x²-300x-100x+30000=0
x(x-300)-100(x-300)=0
(x-300)(x-100)=0
x-300=0 x=300 C²=300 C=√300=+/-10√3
x-100=0 x=100 C²=100 C=√100=+/-10
apopeirebeca:
Pai C la puterea a doua nu trebuie sa fie acelasi numar ?
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