Question

Calcule as raízes da função do 2 grau Y=x^2.2x-15

Answer 1

Y=X^2.2X-15 Delta=b^2 -4ac Delta=2^2-4.1.(-15) Delta=4+60 Delta=64 X= -b+-raiz de delta/2a X= -2 +- raiz de 64/2.1 X= -2 +- 8/2 X'= -2 +8/2 X'= 6/2 X'= 3 X"= -2 +8/2 X"= -10 /2 X"= -5