Question

Dada a expressão X= -b+√b2-4ac/2.a Sendo a=1,b=-7ec=10, o valor numerico de x é?

Answer 1

x= -b √b^2-4ac/2a
x= - (-7) √(-7)^2 - 4*1*10/2*1
x= 7 √49 - 40/ 2
x= 7 √9 /2
x= 7+3 / 2
x= 10/2
x= 5