Tick (✓) the correct answer:

Question:

Tick (✓) the correct answer:

y2 + 2y − 3 = ?

(a) (y − 1)(y + 3)

(b) (y + 1)(y − 3)

(c) (y − 1)(y − 3)

(d) (y + 2)(y − 3)

Solution:

(a) (y − 1)(y + 3)

$y^{2}+2 y-3$

$=y^{2}+3 y-y-3$

$=y(y+3)-1(y+3)$

$=(y-1)(y+3)$

 

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