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(x-2)^2 + 2x - 4 - 10
(x-2)^2 + 2x - 14
(x-2)^2 - (14 - 2x)
(x-2)^2 - (akar (14-2x)^2
[(x-2)-(14-2x)] [ (x-2)+(14-2x)]
(x-2-14+2x) ( x-2+14-2x)
(3x-14) (12-x)
semoga benar deh. itu cara melengkapkan kuadrat
b.
3x^2 - x - 10
3x^2 - 6x + 5x - 10
3x(x-2) + 5(x-2)
(3x+5) (x-2)
semoga membantu ya ;)