Question

na equação do 2 grau 8x2-5x+13

Answer 1

8x²-5x-13 A= 8 B= -5 C= -13

/\=b²-4•a•c

/\=(-5)²-4•8•(-13)

/\=25+416

/\=441

-b+-√DELTA/2•a=

5+-√441/2•8=

5+-21/16.

X'= 5+21/16

X'= 26/16

X'= 1,625

X"= 5-21/16

X"= -16/16

X"= -1

S={1,625 e -1}