Question

Resolva a equação irracional: a)√x - 2 + 3 = 0
d)√(x+8) (x+3) = 20 E)√x^2 - 12 = 2-x

Answer 1

a) raiz de x = 2-3
    raiz de x = -1
    x= -1 ^2
    x = 1

b) raiz de x + raiz de 8 = 20
    raiz de x + 8^1/2 = 20 
    raiz de x = 20 - 8^1/2
    x= (20-8^1/2)^2
    x=400-8^1
    x= 400 - 8
    x=392

c)raiz de x ^2 -12 = 2 -x
   x-12=2-x
  2x= 14
x=7