Factorise each of the following expressions completely. (a) a²+14a+49
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Step-by-step explanation:
Given expression is a
2
+14a+49
It can factorised as
a
2
+14a+49=a
2
+7a+7a+49
=a(a+7)+7(a+7)
=(a+7)
2
Thus factors are (a+7),(a+7).
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