Question

dada a=5,b= -9 e c= -2 qual o valor de x= -b+ √b²-4ac/2a

Answer 1

x= -(-9)+ √(-9)²-4*5*(-2) / 2*5
x = 9 + √81 + 40 / 10
x = 9 + √121 / 10
x = 9 + 11 / 10
x' = 9 + 11 / 10       x' = 2
x'' = 9 - 11 / 10       x'' = - 0,2