" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
4x^2 + 12x - 72 = 0 dibagi 4
x2 + 3x - 18 =0
( x +6 ) ( x - 3 )
(2x+3)(2x+3)=81
4x^2 + 6x + 6x + 9 = 81
4x^2 + 12x + 9 = 81
4x^2 + 12x + 9 - 81 =0
4x^2 + 12x - 72 = 0
4(x-3)(x+6) =0
x1 = 3
x2 = -6