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Calculati si Simplificati !!

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Răspuns :

x^2+4x+4-y^2=(x+2)^2-y^2=(x+2-y)(x+2+y)
5x+5y+10=5(x+y+2)
fractia=(x+2-y)/5
Andarline
[tex] \frac{x^{2}+4x+4- y^{2} }{5x+5y+10} = \frac{ (x+2)^{2}- y^{2} }{5(x+y+2)} = \frac{x+2-y}{5} [/tex]