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nomer 2 itu d
= (x +3) (x -3) (c.)
2. y² +12y +20
y² +10y +2y +20
(y² +10y) +(2y +20)
y(y +10) +2(y +10)
(y +2) (y +10)
atau (y +10) (y +2) (d.)
Jadi, no. 1 = c.
no.2 = d.
Itu jawbannya.