1. Factorise each of the following expressions. Also, name the identity used to factorise.
a) 9 - 30p + 25p²
b) 121c² - 49
c) 16m² + 72mn +81n²
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Answer:
(a) ( 3-5p) ^2
(b) ( 11c+7 ) ( 11c-7)
(c) (4m+9n) ^2
Step-by-step explanation:
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