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Daca b+c=5,b²+c²=45,5b-5c=?
Repede


Răspuns :

Răspuns:

b²+c²=45=>(b+c)(b-c)=45=>5(b-c)=45=>5b-5c=45

Răspuns: 45

b^2+c^2=45

(b + c) x (b - c) =45

5 x ( b - c ) = 45

5b - 5c=45