Los op (gelijk beginnen!)
,3x
2 - 48 = 0 (2x + 4) (-3x + 21) = 0 x
2 - 34x = -64
x2 - 16 = 0 2x + 4 = 0 v -3x + 21 = 0 x2 - 34x + 64 = 0
x2 = 16 2x = -4 v -3x = -21 (x - 2) (x - 32) = 0
x = 4 v x = -4 x = -2 v x = 7 x - 2 = 0 v x - 32 = 0
x = 2 v x = 32