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Verified answer
Materi KuadratFaktorkan menjadi
(x-y)(x+y)<=0
Karena kurang dari, maka x di antara y.
x-y<0 berarti x < y
x+y > 0 berarti x> -y ditulis duaduanya mnjdi
-y < x < y <<< penyelesaiannya