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Simplificati E(x)=5xla puterea a douav-125 supra x la a doua - 10x+25

Răspuns :

Răspuns:

5x^2 - 125 = (xrad5 - 5rad5)(xrad5 + 5rad5) = rad5(x-5)rad5(x+5) = 5(x-5)(x+5)

x^2 - 10x + 25 = (x-5)^2

E(x) = 5(x-5)(x+5)/(x-5)^2 = 5(x+5)/(x-5)