Tick (✓) the correct answer:
3 + 23y − 8y2 = ?
(a) (1 − 8y)(3 + y)
(b) (1 + 8y)(3 − y)
(c) (1 − 8y)(y − 3)
(d) (8y − 1)(y + 3)
$3+23 y-8 y^{2}$
$=3+24 y-y-8 y^{2}$
$=3(1+8 y)-y(1+8 y)$
$=(3-y)(1+8 y)$
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