Question:
Factorize each of the following expressions:
ax + ay − bx − by
Solution:
$a x+a y-b x-b y$
$=(a x+a y)-(b x+b y)$ [Grouping the expressions]
$=a(x+y)-b(x+y)$
$=(a-b)(x+y)$ $[$ Taking $(x+y)$ as the common factor $]$
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