Question

Me Ajudem Pfvr
x elevado a 2 -4x-5=0

Answer 1

delta = b^2-4ac
delta = (-4)^2 -4*1*(-5)
delta = 16 + 20
delta = 36

Bhaskara = (-b +- raiz de delta)/2*a
(-(-4)+-6)/2*1
x1=4+6 => x1= 10
x2=4-6 => x2= -2