Tentukan himpunan penyelesaian |2y+5| = y-1​

Jawaban:

|2y+5| = y-1

(2y+5)²=(y-1)²

4y²+20y+25=y²-2y+1

3y²+22y+24=0

(3y+4)(y+6)=0

y={-4/3,-6}