Question

calcule as raizes; a) 4x²-100=0,b)3x²-30x=0

Answer 1

a) 4x² -100 = 0
    4x² = 100
      x² = 100/4
      x² = 25
      x = √25
      x - 5


b) 3x² -30x = 0
    3x(x - 10) = 0
    3x = 0                x -10 = 0
      x = 0/3             x = 10
      x = 0